Nassef, Osamah Besheer. <br/><br/>
Studies on weed control in the principal field crops :  survey and chemical control of weeds associated with wheat, cotton, maize and rice in the Noubaria Area  [microform] / 
Osamah Besheer Nassef. 
 -  1972. 
 - 237, 14 leaves :  ill. ;  30 cm. 
<br/><br/>Thesis (M.S.)-- Alexandria University, 1972. 
<br/><br/>Includes bibliographical references (leaves 224-37). 
<br/><br/><br/>Microfiche. <br/>ASUNET, <br/>Ain Shams University, <br/>4 microfiches : negative. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Weeds--Control.<br/>Field crops