=LDR 22 4500 =001 2218 =082 04$a960 O'C =100 1\$aO'Connor, A. M. =245 10$aThe geography of tropical African development =260 \\$aOxford :$bPergamon Press,$c1971 =650 \0$aBooks =852 \\$bFreeman Library$h960 O'C