TY  - BOOK
AU  - Beck Charles B Ed.
TI  - Origin and evolution of gymnosperms
SN  - 812110310X (hbd)
U1  - I6, M8   Carb 
PY  - 1988///
CY  - Dehradun
PB  - Bishen Singh Mahendra Pal Singh      
KW  -  Gymnosperms-Evolution
KW  -  Paleobotany
KW  - Gymnosperms-Origin
N1  - Index 487-504p
ER  -