TY  - BOOK
AU  - Raj,Des.
TI  - The Design of Sample Surveys
U1  - S9 R001.433 RAJ 
PY  - 1972///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - Sampling Theory, The NAture of Sampling MethodsBasic Principles of Sampling
ER  -