TY  - BOOK
AU  -  Welch,Paul S.
AU  - Boell,E.J.
TI  - Limnology 
U1  - 551.48 WEL  
PY  - 1952///.
CY  - New York : 
PB  - Mc Graw-Hill, 
KW  - Limnology
KW  - Physical features of water
ER  -