National Research Council (U.S.). Mathematical Sciences Education Board & Steen, L. A. (1990). On the shoulders of giants: New approaches to numeracy. National Academy Press.

National Research Council (U.S.). Mathematical Sciences Education Board and Lynn Arthur Steen. On the Shoulders of Giants: New Approaches to Numeracy. Washington, D.C.: National Academy Press, 1990.

National Research Council (U.S.). Mathematical Sciences Education Board and Lynn Arthur Steen. On the Shoulders of Giants: New Approaches to Numeracy. National Academy Press, 1990.