The theory of interest
as determined by impatience to spend income and opportunity to invest itNew York : Macmillan, 1930A treatise on money /
1 : The pure theory of moneyLondon : Macmillan, 1930Staatliche Theorie des Geldes
2. Aufl., durchges. und verm., München [u.a.] : Duncker & Humblot, 1918