=LDR 22 4500 =001 3595 =082 04$a526 WIL =100 1\$aWilson, A. G. =245 10$aMathematics for geographers and planners =260 \\$aOxford :$bClarendon Press =650 \0$aBooks =700 1\$aKirkby, M. J. =852 \\$bFreeman Library$h526 WIL