TY  - BOOK
AU  - Gass,Saul I.
AU  - Sisson,Roger L
AU  - United StatesEnvironmental Protection AgencyOffice of Research and Development
TI  - A Guide to models in governmental planning and operations
SN  - 0915318008
PY  - 1975///
CY  - Potomac Md.
PB  - Sauger Books
KW  - Policy sciences
KW  - Mathematical models
N1  - 'Prepared for Office of Research and Development, Environmental Protection Agency ... contract no. 68-01-0788.'; Includes bibliographical references
ER  -