Media type: E-Article Title: Donald T. Campbell and Research Design Contributor: Trochim, William M.K. Published: SAGE Publications, 1998 Published in: American Journal of Evaluation, 19 (1998) 3, Seite 407-409 Language: English DOI: 10.1177/109821409801900316 ISSN: 1098-2140; 1557-0878 Origination: Footnote: