Mahmuda, A. .; Yakubu, Y. .; Abdulllahi Raji, A. .; Lawal, N. .; Saidu, B. .; Danmaigoro, A. .; Bello, A. . Prevalence of Gastrointestinal Round Worms in Calves in Sokoto, Northwestern, Nigeria. Sci. J. Zool. 2012, 1, 26-30.