Author: Berger, L.
Title: Embrional and larval development of F1 generation of green frogs different combinations.
Description: Kraków, Polskiej Akademii Nauk, 1967. 8vo (24.1 x 17.0 cm). 40 pp., nine (groups of) text figures. Drophead title. No wrappers (not issued). = Interesting study on European "green frogs", a species complex. Published in the Acta Zoologica Cracoviensia, of which this is an offprint. Small former owner's stamp on front page, otherwise a very good, clean copy.

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