TY - BOOK AU - Hardyck, Curtis D AU - Petrinovich, Lewis F TI - Understanding research in the social sciences: a practical guide to understanding social and behavioral ressearch SN - 0-7216-4518-6 AV - H 62 H25 PY - 1975/// CY - Philadelphia, Pa. PB - W. B. Saunders KW - Ciencias sociales KW - Investigación KW - Sociologia - ER -