![LETTERS TO THE EDITOR]()
LETTERS TO THE EDITORMARTIN LAPINSKY, MELANIE ROVNER, KENT W. WOOD, F. R. KAPPEL, CHARLES A. PARKER, FRANZ G. GARTNER, PETER GRACE, R. G. FOLLlS, FRANCIS D. TAPPAAN, M. R. LEFKOE, HAIG BABIAN, H. E. BRAMSTON-COOK, AARON KALINOWSKI, FRANZ L. HELBIG and RICHARD W. GRAVES · Challenge · 1964