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ProblemsDaniel B. Shapiro, Stanley Rabinowitz, Sidney H. Kung, Howard Morris, John O. Kiltinen, Irl C. Bivens, Frank W. Schmidt, Rodica Simion, Murray S. Klamkin, Andrew Cusumano, Western Maryland College Problems Group, Jean-Marie Monier, David Callan, George Gilbert, Brian D. Beasley, Richard L. Francis, Stephen I. Gendler, Bernardo Recaman, Jerrold W. Grossman, Greg Fredricks, Harvey Schmidt, Jr. and Barry Brunson · Mathematics Magazine · 1991