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by Andrew Fraknoi, David Morrison, Sidney Wolff
by Fraknoi, Andrew, Morrison, David, Wolff, Sidney C
by Fraknoi, Andrew; Morrison, David; Wolff, Sidney C.
by Andrew Fraknoi; David Morrison and Sidney Wolff
by Andrew Fraknoi; Sidney C. Wolff; David Morrison
by Fraknoi, Andrew; Morrison, David; Wolff, Sidney