TY  - BOOK
AU  - "Lakes and Water Management (30th: 1980: Helsinki, "
TI  - "Lakes and water management: proceedings of the 30 years Jubliee Symposium of the Finnish Limnological Society, held in Helsinki, Finland, 22-23 September 1980"
U1  - 574.526 
PB  - "Dr W. Junk Publishers,"
ER  -