His Canadian life tables, 1931, 1937.

Univ. of Chicago magazine, July/Aug. 2010: p. 77 (Nathan Keyfitz, Univ. of Chicago, Ph. D., 1952; d. Apr. 6, 2010 at age 96 in Cambridge, Mass.; research statistician, Canada's Dominion Bureau of Statistics; taught at Univ. of Chicago and Harvard; first president, International Institute for Applied Systems Analysis near Vienna, Austria, 1998)