Schumann, Gail L.  1951- <br/><br/>
Plant diseases :  their biology and social impact / 
Gail   L. Schumann 
 - St. Paul, Minn. :  APS Press, American Phytopathological  Society,  c1991 
 - viii, 397 p. :  ill. ;  24 cm. 
<br/><br/>Bibliography & index. 
<br/><br/><label>ISBN: </label>0890541167 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant diseases<br/>Plant diseases--Social aspects
<br/><br/><label>Dewey Class. No.: </label>581.2  / S392P 1991