Media type: E-Article Title: Conceptualization for planning and evaluation Contributor: Trochim, William M.K.; Linton, Rhoda imprint: Elsevier BV, 1986 Published in: Evaluation and Program Planning Language: English DOI: 10.1016/0149-7189(86)90044-3 ISSN: 0149-7189 Origination: Footnote: