TY  - BOOK
AU  - Welch, Paul S
TI  - Limnology
U1  - 577.6  WEL-L2 
PY  - 1952///
CY  - McGraw-Hill book Co, Inc, NewYork
KW  - Aquatic ecology-- Fresh water ecology-- Pond ecology-- Limnology (biology)-- groundwater ecology
ER  -