000 00272nam a2200121Ia 4500
008 211209s1978 xx 000 0 und d
041 _aeng
082 _aBAU
100 _aBAUMOL W J
245 _aECONOMIC THEORY AND OPERATION ANALYSIS
260 _c1978
300 _a695
999 _c13820
_d13820