Foster, EM, Bickman, L. (1996). An evaluator's guide to detecting attrition problems
.
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