Author: Cramer, F.H..
Title: Microplankton from three palaeozoic formations in the province of Leon (NW-Spain).
Description: Leiden; 1964; J.J. Groen & Zoon; softcover; thesis; text figures and plates in b&w; paged 257-357 + plates. With an index of symbols and abbreviations used. Summary in Spanish.

Keywords: biology/biologie geology/geologie physics/natuurkunde science/algemene wetenschap thesis/proefschrift