TY  - BOOK
ED  - Mitchell ,D.S.
ED  - Thomas,P.A.
TI  - Ecology of water weeds in the neotropics
T2  - Technical papers in hydrology;no.12
U1  - 581.5263 
PY  - 1972///
CY  - Paris
PB  - UNESCO
N1  - A contribution to the International Decade
ER  -