TY  - BOOK
AU  - Pons, Valdo
TI  - Introduction to social research
SN  - 99760602308
AV  - HN29.P6 1992 
PY  - 1992///
CY  - Dar es Salaam
PB  - Dar es salaam University press.
N1  - Includes bibliographic and indexes
ER  -