TY  - BOOK
AU  - Wetzel,Robert G
TI  - Limnology: lake and river ecosystems 
SN  - 0127447601
U1  - 551.48 
PY  - 2001///
CY  - San Diego
PB  - Academic Press
KW  - Limnology
KW  - Nitrogen cycle
KW  - Water economy
KW  - Oxgen
N1  - Includes bibliographical references
ER  -