TY  - GEN
AU  - Cobb,Boughton
AU  - Foster,Laura Louise
TI  - A field guide to ferns and their related families: Northeastern and central North America with a section on species also found in the British Isles and Western Europe 
SN  - 0395194318 (pbk.)
U1  - 587 12
PY  - 1984///,c1956
CY  - Boston, MA
PB  - Houghton
KW  - Ferns
KW  - Identification
KW  - sears
ER  -