=LDR 22 4500 =001 3533 =082 04$a910.02 THO =100 1\$aThomas, William L. =245 10$aMan's role in changing the face of the earth =260 \\$aChicago :$bThe University of Chicago Press,$c1956 =650 \0$aBooks =852 \\$bFreeman Library$h910.02 THO$zNot located