00281nam a2200121Ia 4500082002400000100001700024245002600041260002600067300002900093490002700122500000500149700000500154  a309.412021bL675.MS  aLewis, Peter  aMaps and statisticsb  aLondonbMethuenc1977  axvii, 318p. Index, Bibl.  aThe field of Geography  a  a