Sill, Webster H.,  1916- <br/><br/>
The plant protection discipline  problems and possible developmental strategies 
by Webster H. Sill, Jr 
 - Montclair, N.J  New York  Allanheld, Osmun & Co.  distribution Halsted Press  c1978 
 - x, 190 p.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants, Protection of
<br/><br/><label>Dewey Class. No.: </label>632