TY  - BOOK
AU  - Tryon Rolla M
AU  -  Tryon Alice F
TI  - Ferns and allied plants: With special reference to tropical America
U1  - I42:11.73, M2 
PY  - 1982///
CY  - New York    
PB  -  Springer-Verlag        
KW  -  Ferns
KW  - Botany
ER  -