Text ( visual ) : unmediated Introduction to the study of economics / by Charles J. Bullock. -- 3rd., rev. and enl. -- New York : Silver, Burdett , c1908. -- 619 p. ; 20 cm. -- Includes bibliographical references (p. 589-607) and index. -- (BA83049317) ; https://ci.nii.ac.jp/ncid/BA83049317 Author Heading(s): Bullock, Charles Jesse