TY  - BOOK
AU  - Cobb,Boughton
TI  - A field guide to the ferns and their related families of northeastern and central North America: with a section on species also found in the British Isles and western Europe 
SN  - 0395075602
AV  - QK525 .C75
U1  - 587.3 
PY  - 1963///]
CY  - Boston
PB  - Houghton Mifflin
KW  - Ferns
KW  - North America
KW  - Identification
KW  - Northeastern States
KW  - Canada, Eastern
KW  - Botany
N1  - Includes bibliographical references (pages 263-267) and index
N2  - A guide to identifying North American ferns
ER  -