00755nam a22002057a 4500 BD-DhUL 20141223100552.0 141223s1965 -uka|||| |||| 001 0 eng d BD-DhUL BD-DhUL 587.31 COF Cob, boughton. A field guide to the ferns : and their related families of northestern and central north america / by Boughton Cobb. Cambridge : Boughton mifflin company, c1956. xviii, 281p. : ill. ; 19cm. the peterson field guide series. includes bibliographical references and index. Ferns -- North America -- Identification. Fougères -- Amérique du Nord -- Identification. ddc BK 23984 23984 0 0 ddc 0 587_310000000000000_COF 0 NFIC 46273 DUSL DUSL GEN 1972-09-11 Donated 587.31 COF A86418 2014-12-23 2014-12-23 BK