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Peak, Philip ; Tobin, Alexander ; Booth, Ada ; Taylor, Loretta M. ; Spangler, Richard C. ; Beardslee, Edward C. ; Kepner, Henry S. ; Forsythe, Alexandra ; Holland, Margaret ; Zoet, Charles J. ; Brieske, Thomas J. ; Wheeler, Margariete Montague ; Sadler, Paul M.
The Mathematics teacher, 1978-12, Vol.71 (9), p.779-782 [Peer Reviewed Journal]Full text available