Attiyat Abdelrahman Ahmed <br/><br/>
A study on silt deposition in the irrigation canals of nothern Gezira /  
Attiyat Abdelrahman Ahmed ; Supervised Omer Elbadri , Asim Ibrahim Elmoghraby 
 - Khartoum :   Attiyat Abdelrahman Ahmed ,   1984 
 - 141P. :   charts , maps , photographs ;   30cm 
<br/><br/> Gift from Pro.Dr.Kamal H. Batanouny 
<br/><br/>Thesis (M.Sc.) - Khartoum University - Institute of environmrental studies - Department of Environmental Studies