00383nam a2200109Ia 4500082002500000100003600025245014700061260002600208300002900234500000500263700000500268  a309.250202bSc431.TA  aScottish Development Department  aThreshold analysis manual; prepared by the Planning Research Unit, Department of Urban Design and Regional Planning, University of Edinburghb  aEdinburghbHMSOc1973  ax, 201p. Glossary, Bibl.  a  a