The challenge of survival  chemicals /  [videorecording] : 
produced by Spcot Educational Media 
 - 1 videocassette (u-matic) (10 min.) :  sd., col. ;  1/2 in. 
<br/><br/> Copy available in DVD format 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural research.<br/>Agricultural insects and pests.<br/>Chemical pallution.