TY  - BOOK
AU  - Erdtman,G.
TI  - An introduction to pollen analysis / 
T2  - Chronica Botanica: new series of plant science books ; 
U1  - 582.0463 
PY  - 1943///
CY  - New York : 
PB  - Ronald Press, 
KW  - Pólen
KW  - Fósseis
ER  -