00374nam a2200145 a 450000500170000000800410001704100080005808200110006610000200007724500530009726400300015030000110018065000230019165000140021420260717091225.0260717s1986    ii            000 0 eng d  aeng04a910.021 aThompson, R. D.10aProcess in physical geography /cThompson, R. D. 1aLondon :bLongman,c1986.  a379 p. 4aPhysical geography 4ageography