TY  - SER
AU  - Wilkening,A.Eugene
AU  - Ess,J.C.Van
TI  - Response stability in survey research among lower class respondents in rural Brazil
PY  - 1970///
PB  - Centro Latinoamericano de INvestigaciones en Ciencias Sociales, 
KW  - Campesinos
KW  - Investigacion social
KW  - Brasil
ER  -