Muenscher, Walter Conrad Leopold,  1891-1963. <br/><br/>
Keys to spring plants 
W. C. Muenscher and L. C. Petry 
 - 6th ed. 
 - Ithaca  Comstock Publishing Associates  1958 
 - 32 p. ; 20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--New York