00258nam a2200109Ia 4500082002200000100001800022245004000040260004200080300001600122500000500138700000500143  a338.5142bN427.MC  aNelson, J. R.  aMarginal cost pricing in practiceb  aEnglewood CliffsbPrentice-Hallc1964  axxii, 266p.  a  a