Die deutsche Kreditbank
Tübingen : Mohr, 1922The theory of interest
as determined by impatience to spend income and opportunity to invest itNew York : Macmillan, 1930Mathematical investigations in the theory of value and prices
2. print., New Haven, Conn. [u.a.] : Yale Univ. Press [u.a.], 1926The theory of interest
as determined by impatience to spend income and opportunity to invest itNew York : Macmillan, 1930