Cooray, P. G. (2013). The Geological Sciences in the Service of Nigeria. University of Ife Press.
Lua i Stíl Chicago (17ú heag.)Cooray, P. G. The Geological Sciences in the Service of Nigeria. University of Ife Press, 2013.
Lua MLA (9ú heag.)Cooray, P. G. The Geological Sciences in the Service of Nigeria. University of Ife Press, 2013.
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