00268nam a2200109Ia 4500082002000000100002300020245004200043260004800085300001500133500000500148700000500153  a309.25bH644.RP  aHilhorst, J. G. M.  aRegional planningba systems approach  aRotterdambRotterdam University Pressc1971  axiv, 151p.  a  a