Tryon, Rolla Milton <br/><br/>
The ferns and fern allies of Wisconsin 
by R.M. Tryon, Jr. [and others. 
 - 2d ed. 
 - Madison  University of Wisconsin Press  1953. 
 - v, 158 p.  illus., maps.  26 cm. 
<br/><br/>Bibliography: p. 151. 
<br/><br/><label>LCCN: </label>53009676  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pteridophyta<br/>Ferns--Wisconsin.
<br/><br/><label>LC Class. No.: </label>QK525.5.W5  / T76 1953 
<br/><br/><label>Dewey Class. No.: </label>587