TY  - BOOK
AU  - Christensen, Carl
TI  - Index filicum. Supplementum
SN  - 3874290492
U1  - 578.3 CHR 
PY  - 2001///
CY  - Dehra Dun
PB  - Bishen Singh Mahendra Pal Singh
KW  - Ferns
KW  - Pteridophyta
KW  - Species
ER  -