Conard, Henry Shoemaker <br/><br/>
How to know the mosses and liverworts  pictured-keys for determining many of the North American mosses and liverworts, with suggestions and aids for their study. 

 - Dubuque, Iowa  W. C. Brown Co.  1956, c1944. 
 - ix, 226 p.  illus. 
 - Pictured key nature series .
<br/><br/> Previously published under title: How to know the mosses.  Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bryophytes--Identification.--North America<br/>Liverworts--Identification.--North America<br/>Mosses--Identification.--North America