00399nam a22001457i 4500001001000000005001700010008004100027020001500068082001800083100001600101245005700117260003600174300001700210650002600227SXC01988320260819093655.0260101s1981    ii            000 0 eng d  a0080252222  a909 DUN-Q222  aDuncan, S S10aQualitative change in human geography /cDuncan, S S  abPergamon Press, Oxford,c1981  ap. ;c22 cm. 0aGeneral world history