Foster, EM, Bickman, L. (1996). An evaluator's guide to detecting attrition problems
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Evaluation Review, 20(6), 695-723. 10.1177/0193841X9602000603
Foster, EM, Bickman, L. (1996). An evaluator's guide to detecting attrition problems
. Evaluation Review, 20(6), 695-723. 10.1177/0193841X9602000603