TY  - BOOK
AU  - Erdtman, G.
TI  - Pollen and spore morphology/plant taxonomy; gymnospermae, pteriodophyta, bryophyta (Illustrations)
AV  - QK658.E73P1957 
PY  - 1957///
CY  - Stockholm 
PB  - Ronald Press Co. 
KW  - Pollen -- Morphology
KW  - Plants -- Classification
KW  - Plant spores
KW  - Plants
ER  -