TY  - BOOK
AU  - Sladecek, Vladimir
TI  - System of water quality from the biological point of view
SN  - 3510470052
U1  - 577.6 21st ed.
PY  - 1973///
CY  - Germany : 
PB  - E.Scweizerbart'sche Verlagbuchandlung , 
KW  - water management
KW  - water resources
KW  - Limnosprobity
N1  - Content: v.7
ER  -