TY  - BOOK
AU  - Asher,Herbert B.
TI  - Polling and the public: what every citizien should know 
SN  - 0-87187-402-4
AV  - HM261 A84
PY  - 1988///
CY  - Washington, D. C.
PB  - CQ press
N1  - Incluye bibliografia
ER  -