TY  - BOOK
AU  - Casley D J
AU  - Lury D A
TI  - Data collection in developing countries
U1  - 300.723091724 
PY  - 1981///
CY  - Oxford
PB  - Clarendon Press
KW  - Developing countries
KW  - Sampling(Statistics)
KW  - Social surveys
KW  - Statistical services
ER  -