=LDR 22 4500 =001 4901 =082 04$a551.790961 WIL =100 1\$aWilliams, Martin A. J. =245 10$aThe Sahara and the Nile: quaternary environments and prehistoric occupation in northern Africa =260 \\$bA.A.Balkema,$c1980 =650 \0$aBooks =700 1\$aFaure, Hugues =852 \\$bFreeman Library$h551.790961 WIL$zNot located