TY  - BOOK
AU  - Erdtman, G.
TI  - Introduction to polynology
T2  - Pollen and spore morphology/plant taxonomy
U1  - 582.13 
PY  - 1957///
CY  - New York
PB  - Ronald
N1  - Includes index; Contents: v.2.Gymnospermae, pateridophyta, bryophyta
ER  -