Petrak F <br/><br/>
Index of fungi 1936-1939 
Petrak F 
 -  1950 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>50484 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Fungi<br/>Botany
<br/><br/><label>Dewey Class. No.: </label>I23a, J0