Descriptors N
- cat. JnamibiaESFR
- BT1southern africa
- BT2africa
- cat. FnannoplanktonESFR
- BT1plankton
- rtphytoplankton
- rtzooplankton
- cat. Hnational levelESFR
- BT1organizational levels
- cat. Cnatural evaporationESFR
- BT1wastage
- NT1reservoir evaporation
- rtevaporation
- rtevaporation retardants
- rtevapotranspiration
- rthydrological cycle
- rtwater balance
- natural purificationFR
- useself-purification
- cat. A1natural rechargeESFR
- BT1recharge
- NT1percolation
- NT1seepage
- rthydrological cycle
- cat. A1natural resourcesESFR
- NT1water resources
- NT2groundwater
- NT2springwater
- NT3artesian springs
- NT3fissure springs
- NT3thermal springs
- NT2surface waters
- NT3canals
- NT4irrigation canals
- NT3estuaries
- NT3lakes
- NT3ponds
- NT4fishponds
- NT4village ponds
- NT3rivers
- cat. FnecatorESFR
- BT1nematodes
- BT2helminths
- BT3pathogens
- NT1necator americanus
- rtancylostomiasis
- cat. Fnecator americanusESFR
- BT1necator
- BT2nematodes
- BT3helminths
- BT4pathogens
- negotiationFR
- useconsultation
- cat. FneisseriaceaeESFR
- BT1bacteria
- BT2microorganisms
- cat. FnematodesESFR
- ufroundworms (general)
- BT1helminths
- BT2pathogens
- NT1ancylostoma
- NT2ancylostoma duodenale
- NT1ascaris
- NT2ascaris lumbricoides
- NT2ascaris suum
- NT1dracunculus
- NT1enterobius
- NT2enterobius vermicularis
- NT1filaria
- NT1gnathostoma
- NT1necator
- NT2necator americanus
- NT1onchocerca
- NT1strongyloides
- NT2strongyloides fuelleborni
- NT2strongyloides stercoralis
- NT1toxocara
- NT1trichuris
- NT2trichuris suis
- NT2trichuris trichuria
- NT1wuchereria
- NT2wuchereria bancrofti
- rtmicroorganisms
- cat. JnepalESFR
- BT1south asia
- BT2asia
- cat. JnetherlandsESFR
- ufholland
- BT1europe
- rtnetherlands antilles
- cat. Jnetherlands antillesESFR
- ufaruba
- ufbonaire
- ufcuracao
- ufsaba
- ufst eustatius
- ufst maarten
- BT1caribbean
- BT2america
- rtnetherlands
- cat. InetworksESFR
- NT1information networks
- cat. E1neutralizationESFR
- BT1chemical treatment
- BT2wastewater treatment
- BT2water treatment
- rtph control
- cat. E1new caledoniaESFR
- ufpacific islands (french)
- BT1oceania
- rtvanuatu
- new hebridesFR
- usevanuatu
- new practicesESFR
- useinnovations
- cat. Jnew zealandESFR
- BT1oceania
- rtpacific islands (nz)
- cat. JnicaraguaESFR
- BT1central america
- BT2america
- cat. JnickelESFR
- BT1heavy metals
- BT2pollutants
- BT1metals
- BT2chemical elements
- cat. JnigerESFR
- BT1west africa
- BT2africa
- rtsahel
- cat. JnigeriaESFR
- BT1west africa
- BT2africa
- night soil
- usehuman excreta
- cat. Hnight soil collectorsESFR
- ufscavengers
- BT1occupations
- rtcartage
- rtexcreta collection
- rthandcarts
- rthuman excreta
- rtmanual removal
- night soil utilization
- useexcreta use
- night-sky radiant stillsESFR
- usesolar distillation
- cat. Knirmali seedsESFR
- ufstrychnos potatorum
- BT1coagulants/flocculants
- BT2chemicals
- rtcoagulation/flocculation
- rtfluoride removal
- rtpolyelectrolytes
- cat. KnitratesESFR
- BT1nitrogen
- BT2nonmetals
- BT3chemical elements
- rtchemical quality
- rteutrophication
- rtmethaemoglobinaemia
- rtnitrification
- cat. E1nitrificationESFR
- Conversion of the ammoniacal NITROGEN in SEAWGE to NITRITES and thence to NITRATES
- BT1wastewater treatment
- rtammonia
- rtnitrates
- rtnitrites
- rtproteins
- cat. KnitritesESFR
- BT1nitrogen
- BT2nonmetals
- BT3chemical elements
- rtmethaemoglobinaemia
- rtnitrification
- cat. KnitrogenESFR
- BT1nonmetals
- BT2chemical elements
- NT1ammonia
- NT1nitrates
- NT1nitrites
- rtcarbon/nitrogen ratio
- rtnutrients
- nitrogen removalES
- usedenitrification
- cat. Gnomadic communitiesESFR
- BT1rural communities
- BT2communities
- rtmigration
- nomadismES
- useseasonal migration
- non-formal educationFR
- useinformal education
- cat. Hnon-governmental organizationsESFR
- BT1organizations
- NT1voluntary agencies
- rtnon-profit organizations
- cat. Dnon-piped distributionESFR
- BT1water distribution
- NT1tanker transport
- NT1water carrying
- NT2animal carrying
- NT2human carrying
- NT2water vendors
- cat. Hnon-profit organizationsESFR
- BT1organizations
- rtnon-governmental organizations
- rtvoluntary agencies
- cat. KnonmetalsESFR
- BT1chemical elements
- NT1carbon
- NT2carbon dioxide
- NT2organic carbon
- NT1halogens
- NT2bromine
- NT2chlorine
- NT3chlorine residual
- NT3combined available chlorine
- NT3free available chlorine
- NT2fluorine
- NT2iodine
- NT1hydrogen
- NT2hydrogen sulphide
- NT1nitrogen
- NT2ammonia
- NT2nitrates
- NT2nitrites
- NT1oxygen
- NT2dissolved oxygen
- NT1phosphorus
- NT2phosphates
- NT3calcium phosphate
- NT1sulphides
- NT2hydrogen sulphide
- NT1sulphur
- NT2sulphates
- NT2sulphides
- NT3hydrogen sulphide
- NT2sulphur dioxide
- cat. Fnonpathogenic e. coliESFR
- BT1enterobacteriaceae
- BT2bacteria
- BT3microorganisms
- BT1escherichia coli
- BT2enterobacteriaceae
- BT3bacteria
- BT4microorganisms
- BT1faecal bacteria
- norias
- usewater-wheels
- normsES
- usestandards
- cat. Jnorth africaESFR
- BT1africa
- NT1algeria
- NT1egypt
- NT1libya
- NT1morocco
- NT1tunisia
- cat. Jnorth americaESFR
- BT1america
- NT1bermuda
- NT1canada
- NT1mexico
- NT1usa
- north koreaESFR
- usekorea, democratic people´s republic of
- cat. Fnorwalk agentESFR
- BT1viruses
- BT2microorganisms
- BT2pathogens
- rtviral diarrhoeas
- cat. JnorwayESFR
- BT1europe
- novel practices
- useinnovations
- nupharESFR
- usewater-lilies
- nurses
- usemedical personnel
- cat. FnutrientsESFR
- NT1food
- NT1plant nutrients
- NT2fertilizers
- rtagriculture
- rtchemicals
- rteutrophication
- rtnitrogen
- rtnutrition
- rtphosphorus
- cat. FnutritionESFR
- rtfish
- rtmalnutrition
- rtnutrients
- nymphaeaESFR
- usewater-lilies