Germany Deutschland 5 DM 1967 J J.387 Kursmünze Silber. 337.0046.12 EF | MA-Shops
HRBÁČEK, J. [ED.]. 1966. Hydrobiological Studies I. Academia, Prague. 408 p. 70 Kčs. (Also available through E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart. DM 50.) - FREY - 1968 - Limnology and Oceanography - Wiley Online Library