Cooray, P. G. (2013). The Geological Sciences in the Service of Nigeria. University of Ife Press.
Chicago-viite (17. p.)Cooray, P. G. The Geological Sciences in the Service of Nigeria. University of Ife Press, 2013.
MLA-viite (9. p.)Cooray, P. G. The Geological Sciences in the Service of Nigeria. University of Ife Press, 2013.
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