Langley, Russell. creator text New York Dover Publications [1971, c1970] Rev. ed. monographic ix, 399 p. illus. 22 cm. 1968 ed. has title: Practical statistics for non-mathematical people. 0 0 0 519_500000000000000_LAN NUST Probabilities Statistics 519.5 LAN 0486227294 (pbk) http://www.loc.gov/catdir/description/dover032/77145771.html http://www.loc.gov/catdir/description/dover032/77145771.html