TY  - DATA
AU  - Sastry N S
TI  - On a general class of unbiased ratio, product, ratio-cum-product and regression type estimators
U1  - 000SA.6 
CY  - 1974
KW  - Regression type estimators
KW  - Unbiased ratio
UR  - http://192.168.143.32:8080/jspui/bitstream/10263/3613/1/TH85.pdf
ER  -