=LDR 22 4500 =001 5101 =082 04$a910.22 CHO =100 1\$aChorley, Richard J. =245 10$aSocio-Economic Models in Geography: parts 1 and 2 of models in geography =260 \\$aLondon :$bMethuen,$c1967 =650 \0$aBooks =700 1\$aHaggett, Peter =852 \\$bFreeman Library$h910.22 CHO