000 00303nam a2200121Ia 4500
008 220201s1965 xx 000 0 eng d
082 _a380
_bCOX
100 _aCox (T W) & Lawson (Reference ) .
245 0 _aModel answers in the structure of commerce .
260 _c1965
300 _a160
942 _2ddc
999 _c3930
_d3930