000 00233nam a2200097 4500
245 _aPrice theory
_cW. J. L. Ryan
100 _aRyan, W. J. L.
260 _aLondon
_bMacmillan
_c1977
300 _axvi,399p.; 21cm.
082 _a338.521
_bRYA
999 _c26966
_d26966