THE EXPERIMENTAL STUDY OF WATER SNAILS IN A FISH POND IN TANGANYIKA. II. ATTEMPTS TO ESTABLISH REPRODUCIBLE CONDITIONS.
D000818:Animals; D004463:Ecology; D006801:Humans; D061005:Ponds; D012908:Snails; D013636:Tanzania; D014867:Water
D014867:Water
ECOLOGY; SNAILS; TANZANIA