Gleason, A. M., Greenwood, R. E., & Kelly, L. M. (1980). The William Lowel Putnam mathematical competiton: Problems and solutions: 1938-1964. The Mathematical Association of America.
Citace podle Chicago (17th ed.)Gleason, Andrew M., R. E. Greenwood, a L. M. Kelly. The William Lowel Putnam Mathematical Competiton: Problems and Solutions: 1938-1964. Washington, D.C: The Mathematical Association of America, 1980.
Citace podle MLA (9th ed.)Gleason, Andrew M., et al. The William Lowel Putnam Mathematical Competiton: Problems and Solutions: 1938-1964. The Mathematical Association of America, 1980.
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