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Problem DepartmentPaul D. Thomas, Howard D. Grossman, H. S. Grant, Robert C. Yates, D. L. MacKay, Mathematics Club, Tulane University, Morris Chernofsky, H. K. Humphrey, V. Thebault, D. C. Binneweg, N. A. Court, E. P. Starke and N. A. Court · National Mathematics Magazine · 1941