TY  - BOOK
AU  - Walker,Warren E.
ED  - Research and Development Corporation, 
TI  - Models in the policy process : past, present, and future
T2  - The Rand paper series
PY  - 1981///
CY  - Santa Monica, California
PB  - Rand Corporation
KW  - Policy sciences
KW  - Mathematical models
KW  - Economic policy
KW  - Mathematical models.
N1  - Includes bibliographical references: pages 27-28
ER  -