Evaluating health interventions : an introduction to evaluation of health treatments, services, policies, and organizational interventions /
�vretveit, John, 1954-
Evaluating health interventions : an introduction to evaluation of health treatments, services, policies, and organizational interventions / John �vretveit. - Buckingham [England] ; Philadelphia : Open University Press, 1998. - xi, 324 p. : ill. ; 25 cm.