Text ( visual ) : unmediated The elements of economics / by Charles J. Bullock ; 育英書院編輯部編. -- Tokyo : Ikueishoin , 1931. -- 146, 5 p. ; 19 cm. -- (The text-books for kōtō gakkō ; No.2). -- Includes index. -- (BB05465013) ; https://ci.nii.ac.jp/ncid/BB05465013 Other Title(s): 經濟學原論 ; 経済学原論. -- Author Heading(s): Bullock, Charles Jesse ; 育英書院編輯部