Jennings, Otto Emery, 1877-1964 <br/><br/>
Wild flowers of western Pennsylvania and the upper Ohio basin 

 - Pittsburgh  University of Pittsburgh Press  1953 
 - 2 v.  200 láms. col., mapas; 37 cm. 
<br/><br/> Bibliografía: v. 1, p. liii-lvi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PENNSYLVANIA<br/>ILUSTRACIONES<br/>FLORES SILVESTRES<br/>ESTADOS UNIDOS