Hays, William Lee, 1926- Hays, William Lee, 1926- Quantification in psychology / [by] William L. Hays. - Belmont, CA : Brooks/Cole Pub. Co., [1967] - Basic concepts in psychology series . Bibliography: p. 83. LCCN: 67012819 Subjects--Topical Terms: Psychometrics. LC Class. No.: BF 39 HAY 1967