TY  - BOOK
AU  - Ward, Henry Baldwin
AU  - Whipple, George Chandler
TI  - Fresh-water biology
U1  - 576.192 9 WAR  
PY  - 1918///.
CY  - New York : 
PB  - John Wiley and Sons, 
KW  - Freshwater biology
N1  - Includes index.
ER  -