TY  - BOOK
AU  - Aggarwal,Y.P.
TI  - Better sampling: concepts, techniques, and evaluation 
AV  - QA276.6 .A33x 1988
PY  - 1988///
CY  - New Delhi
PB  - Sterling Publishers Private
KW  - Sampling (Statistics)
N1  - Includes bibliographical references
ER  -