Understanding research in the social sciences : a practical guide to understanding social and behavioral research / Curtis Hardyck; Lewis F. Petrinovich. Hardyck, Curtis Petrinovich, Lewis F. joint author. Social sciences Research. Sociology Research. H62 .H2563 300.72 HAU Includes bibliographies and index. Philadelphia : W.B. Saunders, c1975. c1975. 1975 Text xii, 224 p. : eng Saunders books in psychology