TY  - BOOK
AU  - Abd EL-Rahman,Tharwat Mohamed
TI  - Effect of crop rotation on white rot disease of onion 
PY  - 1990///
KW  - White rot (Onions)
KW  - Onions
KW  - diseases and pests
KW  - Crop rotation
N1  - Thesis (Ph.D.)-- Assiut University, 1990; Includes bibliographical references (leaves 98-108); Microfiche; ASUNET; Ain Shams University; 2 microfiches : negative
ER  -