Social survey research design / 
[by] Critina Parel [and others]. 
 - Quezon City :  Philippine Social Science Council,  1978. 
 - xiii, 168 p. 22 cm 
 - PSSC social survey series, no. 1 .
<br/><br/> Bibliography: p. 166-168 
<br/><br/><label>LC Class. No.: </label>FIL 300.72  / So13