Text ( visual ) : unmediated The elements of economics / by Charles J. Bullock. -- Rev. and enl., [3rd ed.]. -- Boston : Silver, Burdett , 1919. -- vii, 406 p. ; 19 cm. -- Edition from "Preface to the third edition"--p. iv ; Includes index. -- (BA45638608) ; https://ci.nii.ac.jp/ncid/BA45638608 Author Heading(s): Bullock, Charles Jesse. -- Classification(s): DC : 330. -- Subject Heading(s): LCSH : Economics