TY  - BOOK
AU  - Knobloch I W
AU  -  Correll D S
TI  - Ferms and fern allies of chihuahua, mixico
T2  - Series of botanical studies; 13
U1  - I42:12.74.3CH, K2 
PY  - 1962///
CY  - Texas
PB  - Research Foundation        
KW  - Botany
ER  -