=LDR 22 4500 =001 156 =082 04$a519.5 THE =100 1\$aTheakstone, W. H. =245 10$aThe Analysis of Geographical Data =260 \\$aLondon :$bHeinemann,$c1970 =650 \0$aBooks =700 1\$aHarrison, C. =852 \\$bFreeman Library$h519.5 THE