TY  - BOOK
AU  - Labovitz Sanford
AU  -  Hagedorn Robert
TI  - Introduction to social research
U1  - Yb4, L1 
PY  - 1971///
CY  - New York 
PB  - Mcgraw-Hill         
N1  - Bibliography at the end of each chapter; Glossary P103-112
ER  -