00265nam a2200109Ia 4500082002500000100001800025245005800043260002900101300001500130500000500145700000500150  a309.2620151bW746.UR  aWilson, A. G.  aUrban and regional models in geography and planningb  aLondonbJohn Wileyc1974  axiv, 418p.  a  a