The new triangle arithmetics, answers. Grades 5-6. By Leo J. Brueckner, C. J. Anderson, G. O. Banting & Elda L. Merton.
BRUECKNER, LEO J. The new triangle arithmetics, answers. Grades 5-6. By Leo J. Brueckner, C. J. Anderson, G. O. Banting & Elda L. Merton. © 17Oct35; AA188855. Holt, Rinehart & Winston, Inc. (PWH); 14Mar63; R312259.
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