TY  - BOOK
AU  - Stata Corporation
AU  - 
TI  - Stata survey data reference manual
T2  - Statistics, graphics and data management
SN  - 1881228665
U1  - 518.5425 
PY  - 2003///
CY  - Texas
PB  - Stata Press
N1  - "Stata - Release 8"
ER  -