Ozuin - Basic ground-water hydrology: US Geological Survey Water-Supply Paper 2220* - eai gávdnon bohtosat.
Sáhtát oažžut lasi bohtosiid go hábmet iežat ohcama.
- Seđđon ohcamiin sáhttet gávdnot ohcanbohtosat, main leat seammasullasaš sánit: Basic ground-water hydrology: US Geological Survey Water-Supply Paper 2220~.
