Interpretation of technical data / [by] J. W. Richards. Richards, J. W. (John Willis) Correlation (Statistics) Graphic methods. Equations. QA278.2 .R5 1968 517.6 RII Includes Index. London, Iliffe; Princeton, N.J., Van Nostrand : 1967 [i.e. 1968] 1967 [i.e. 1968] 1968 Text [7], 195 p. eng