TY  - BOOK
AU  - Seward, A. C. 
TI  - Fossil plants: A text book for students of botany and geology Vol.2  
U1  - 561 
PY  - 1919///
CY  - London
PB  - Hafner Publishing Company
KW  - Psilotales
KW  - Cordaitales
KW  - Cycadofilices
ER  -