000			00331nam a2200133Ia 4500
008			180612s9999||||xx |||||||||||||| ||und||
041			_aen
082			_a330
100			_aRuffin, Roy J
245		0	_aPrinciples of microeconomics
260			_bScott, Foresman and co. Illin _cois 1979
300			_a(4), v, 41
942			_cPR
999			_c40865 _d40865