=LDR 22 4500 =001 5258 =082 04$a519.5022 DIC =100 1\$aDickinson, Gordon Cawood =245 10$aStatistical mapping and the presentation of statistics =260 \\$aLondon :$bEdward Arnold,$c1973 =650 \0$aBooks =852 \\$bFreeman Library$h519.5022 DIC