Cooray, P. G. (2019). The geological sciences in the service of Nigeria. Obafemi Awolowo University Press Limited.
Chicago-čujuhus (17. p.)Cooray, P. G. The Geological Sciences in the Service of Nigeria. Obafemi Awolowo University Press Limited, 2019.
MLA-čujuhus (9. p.)Cooray, P. G. The Geological Sciences in the Service of Nigeria. Obafemi Awolowo University Press Limited, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.