TY  - BOOK
ED  - United States.
TI  - International field year for the great lakes: no.6
U1  - 551.48 
PY  - 1973///
CY  - Washington, D.C.
PB  - United States Government Printing Office
KW  - Water chemistry
KW  - Hydrology
N1  - IFYGL bulletin no. 6
ER  -