TY  - BOOK
AU  - Smith H W
TI  - Strategies of social research :  The methodological   
T2  - Prentice -Hall method of social science series
U1  - Yb4, M1 
PY  - 1981///
CY  - Englewood
PB  - Cliffs Prentice-Hall         
N1  - Bibliography P472-496
ER  -