000 00284nam a2200097Ia 4500
008 240404s9999 xx 000 0 und d
100 _aKoehler, Gary
245 0 _aOptimization over Leontief Substitution Systems
_cGary Koehler
260 _aNEW York
_bElsevier
_c1975
942 _aIMAR
_cCART
999 _c35179
_d35179