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Sirdar, Mohamed M., Picard, Jackie, Bisschop, Shahn, and Gummow, Bruce (2012) A questionnaire survey of poultry layer farmers in Khartoum State, Sudan, to study their antimicrobial awareness and usage patterns. Onderstepoort Journal of Veterinary Research, 79 (1). 361. pp. 1-8.

Sirdar, Mohamed M., Picard, Jackie, Bisschop, Shahn, Jambalang, Alexander R., and Gummow, Bruce (2012) A survey of antimicrobial residues in table eggs in Khartoum State, Sudan, 2007–2008. Onderstepoort Journal of Veterinary Research, 79 (1). 360. pp. 1-9.