Text ( visual ) : unmediated The elements of economics / by Charles J. Bullock. -- Rev. and enl. [4th ed.]. -- Boston : Silver, Burdett , 1923. -- vii, 406 p. ; 18 cm. -- Bibliography: p. 397-399 ; Includes index. -- (BA28303964) ; https://ci.nii.ac.jp/ncid/BA28303964 Author Heading(s): Bullock, Charles Jesse

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