TY  - BOOK
AU  - Weber,Cornelius I.
ED  - United States.
TI  - Methods of collection and analysis of plankton and periphyton smales in the water polution surveillance system
U1  - 578.776 
PY  - 1970///
CY  - Washington, D.C.
PB  - United States Government Printing Office
KW  - Plankton
KW  - Aquatic environments
N1  - EPA-600/D-70-002
ER  -