Walker, John Charles <br/><br/>
Plant Pathology 

 - Unknown  Unknown  1978 
<br/><br/><label>Subjects--Uniform Titles: </label>--general stack
<br/><br/><label>Subjects--Topical Terms: </label><br/>science--physiology and related subjectsBotany--natural science and mathematics
<br/><br/><label>Dewey Class. No.: </label>571.92  / WAL-P