TY  - BOOK
AU  - Whitford, L. A.
AU  - Schumacher, G. J.
TI  - A manual of fresh - water Algae
U1  - 579.8 
PY  - 1973///
CY  - Raleigh
PB  - Sparks
KW  -  Algae
KW  - Freshwater algae
ER  -