TY  - BOOK
AU  - Lucknow,Birbal Sahni Instt. of Palaeobotany
TI  - Symp. on structure,nomenclature and classification of pollen and spores
U1  - 581.1662 
PY  - 1974///
CY  - Lucknow
PB  - Birbal Sahni Tnstt.
KW  - Botany
ER  -