Journal of Political Economy 1964 72(1), 96-96

Journal of Political Economy 1963 71(3), 293-297

Journal of Political Economy 1962 70(1), 72-75

Journal of Political Economy 1961 69(1), 1-14

Journal of Political Economy 1961 69(6), 621-625

Journal of Political Economy 1960 68(3), 284-287

Journal of Political Economy 1957 65(5), 445-447

Journal of Political Economy 1956 64(6), 459-469

Journal of Political Economy 1954 62(4), 356-357

Journal of Political Economy 1954 62(1), 68-70