TY  - BOOK
AU  - Paul S. Welch
TI  - Limnology. Ed 2
PY  - 1952///
CY  - Nes York
PB  - McGraw-Hill Book Co.
N1  - Paul S. Welch: Limnology. Ed 2.  (2nd Ed)  Nes York.  McGraw-Hill Book Co., 1952.--(574-8929WEL)
ER  -