A. Tende, J.; Mohammed, A. .; D. Eze, E.; A. Tende, Y.; A. Daikwo, O.; Onaadepo, O. .; S. Malgwi, I.; Shaibu, A. . The Effects of Occupational Noise on Sound Perception of Engine Grinders and Airport Staff in Northern Nigeria. Sci. J. Environ. Sci. 2014, 3, 9-12.