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  -