Abd EL-Rahman, Tharwat Mohamed. <br/><br/>
Effect of crop rotation on white rot disease of onion   [microform] / 
 تأثير الدورة الزراعية على مرض عفن الابيض في البصل. 
Tharwat Mohamed Abd El-Rahman. 
 -  1990. 
 - 108, 5 leaves :  ill. ;  30 cm. 
<br/><br/>Thesis (Ph.D.)-- Assiut University, 1990. 
<br/><br/>Includes bibliographical references (leaves 98-108). 
<br/><br/><br/>Microfiche. <br/>ASUNET, <br/>Ain Shams University, <br/>2 microfiches : negative. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>White rot (Onions)<br/>Onions--diseases and pests.<br/>Crop rotation