00365nam a22001097a 450000500170000000800410001705000150005810000170007324500650009026000730015530000270022820260617105207.0260617b        |||||||| |||| 00| 0 eng d  aGF67.N6.N5  aVisser S. A.  aKainji :ba Nigerian man-made lake /cedited by S. A. Visser  aIbadanbThe Nigerian institute of social and economic researchc1970  aviii, 126P.bill., Pbk