Cooray, P. G. (2019). The geological sciences in the service of Nigeria. Obafemi Awolowo University Press Limited.
Čikaški stil citiranja (17. izdanje)Cooray, P. G. The Geological Sciences in the Service of Nigeria. Obafemi Awolowo University Press Limited, 2019.
MLA način citiranja (9. izdanje)Cooray, P. G. The Geological Sciences in the Service of Nigeria. Obafemi Awolowo University Press Limited, 2019.
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