000 00294nam a2200121Ia 4500
008 170101s1971 xx 000 0 und d
082 _a330 WEL
100 _aWelfing Weldon
245 0 _aPrinciples of Economics
260 _bMcGraw Hill Book Co.
_c1971
300 _a488 p.
942 _2ddc
_cB
999 _c344966
_d344966