00520nam a2200169Ia 4500082002600000100002400026245007300050260004800123300001500171500000500186690000600191700000500197952010700202964001700309921000900326999001500335  a309.51509492bH758.OM  aHoltgrefe, A. A. I.  aOptimizing medium term planning model for the Netherlands railwaysb  aRotterdambRotterdam University Pressc1975  axiv, 164p.  a  a   a  00104070aISIbISId1998-07-16l0o309.51509492 H758.OMpDP9038r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a3741  c3741d3741