000 00282nam a2200121Ia 4500
008 221001s1967 xx 000 0 eng d
082 _a338.521 RYA
100 _aRyan, W. J. L.
245 0 _aPrice theory
260 _aLondon
_bMacmillan
_c1967
300 _aix, 396p.
942 _2ddc
_cBK
999 _c665
_d665