TY  - CHAP
T1  - Polling Pitfalls:  Sources of Error in Public Opinion Surveys
AU  - Brady, Henry E.
AU  - Orren, Gary R.
A2  - Mann, Thomas E.
A2  - Orren, Gary R.
PY  - 1992
T2  - Media Polls in American Politics
CY  - Washington, DC
PB  - Brookings
ER  -