=LDR 22 4500 =001 1621 =082 04$a551.792 HAM =100 1\$aHamilton, A. C. =245 10$aEnvironmental history of East Africa: a study of the Quaternary =260 \\$aSan Diego :$bAcademic Press,$c1982 =650 \0$aBooks =852 \\$bFreeman Library$h551.792 HAM