00282nam a2200121Ia 4500100002600000650001400026654002500040245002500065260003100090082001900121300000800140546001200148  aTurner/R.K/ Collis/C   aEconomics  aEconomics Of Planing  aEconomics Of Planing  bMac  MillianaLondonc1977  a338.9bTur/Col  a103  aENGLISH