TY  - BOOK
AU  - Wetzel, Robert G..
TI  - Periphyton of Freshwater Ecosystems / 
SN  - 90-6193-768-X
U1  - G:5p1,N82 
PY  - 1983///
CY  - Netherlands : 
PB  - Dr. W. Junk Publishers , 
KW  - Life Science <Freshwater>
ER  -