TY  - BOOK
AU  - Ruel, Erin E.
TI  - The practice of survey research :  theory and applications 
SN  - 978 1 452 23527 1
U1  - 001 433 RUE 
PY  - 2015///
CY  - Los Angeles 
PB  -  SAGE
KW  - SCIENTIFIC SURVEYS METHODOLOGY
ER  -