Blakeslee, David W. Introductory statistics and probability; : a basis for decision making [electronic resource] / [by] David W. Blakeslee [and] William G. Chinn. Editorial advisors: Andrew M. Gleason [and] Albert E. Meder, Jr.. — Boston, : Houghton Mifflin, [1971]. — ix, 356 p. : illus. (part col.) 25 cm.