Cobb, Boughton. <br/><br/>
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. 
Illustrated by Laura Louise Foster. 
 - Boston,  Houghton Mifflin,  1956. 
 - xviii, 281 p.  illus.  20 cm. 
 - The Peterson field guide series, 10 .
<br/><br/>Bibliography: p. [263]-267. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ferns--Identification.--North America
<br/><br/><label>LC Class. No.: </label>QK525  / .C75 
<br/><br/><label>Dewey Class. No.: </label>587.3