000 002780000a22001210004500
245 _aIntroduction to positive economics
100 _aLipsey, Richard G.
250 _a5th rev. ed.
260 _aLondon
_bWeidenfeld
_c1979
080 _a330
_bL5
041 _aEN
942 _cBK
999 _c115229
_d115229