TY  - BOOK
AU  - Brinberg,David .
AU  - McGrath,Joseph E  .
TI  - Validity and the research process / 
SN  - 0803923021
U1  - 300.72 
PY  - 1985///
CY  - New Delhi : 
PB  - Sage Publications , 
KW  - SOCIAL SCIENCES RESEARCH-METHODOLOGY
N1  - Includes references and index
ER  -