PM & PF
Subtitle: productivity of Estonian water bodies
By: Academy of Sciences of the Estonian SSR, Estonian Republican Committee for IBP ; [editorial, T. Frey ... et al.].
Contributors: Frey, Toomas.; Eesti NSV Teaduste Akadeemia.
Series: Estonian contributions to the International Biological Programme ;; 6
Publisher: Academy of Sciences of the Estonian S.S.R., Estonian Republican Committee for IBP
Published: 1975
Place of publication: Tartu
Language: eng
Number of pages: 261
Subjects: International Biological Programme.; Fishery resources -- Estonia.; Herring -- Estonia.; Fishes -- Estonia -- Vôrtsjärv. 
Other titles: Productivity of Estonian water bodies.; PM and PF.
Notes: Includes bibliographies.