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by Grandin, Temple; Scariano, Margaret M.
by Schiffman, Lawrence H.
by Fogiel, M.
by Rothenberg, Jerome
by Ronald Lane Reese
by Michael Ryan (Northeastern University)
by James E. Brady (St. Johns University); Joel W. Russell (Oakland University); John R. Holum
by University of Chicago School Mathematics Project
by Corey; University St Thomas
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