Elbashir, M.H.M.; Abueissa, H.I.; H, Agab.; Elbasheir, Husna.M.; Elhassan, Sijoud. F.
(Sudan University of Science & Technology, 2017-12-17)
This study was carried out during May, 2015 at states of
Red Sea, Kasala, Gadarif, Gezira and Khartoum- in east
and central of the Sudan. The study was based on well
designed questionnaires to obtain information on ...