Laevastu, Taivo Fisheries oceanography : new ocean environmental services / Taivo Laevastu, Ilmo Hela - London : Fishing News, 1970 - xv, 238 p. : ill., charts. ; 26 cm. References : p. 219-227 ISBN: 0852380097 Subjects--Topical Terms: Fishery oceanography--Hydrologic factors