@misc{indiciaedab75329f218, title = {Problems in retrospectively evaluating a large-scale health intervention program.}, author = {M A Lavenhar and D O Gause and J Foster and D B Louria}, year = {1981}, doi = {10.1007/bf01323008}, url = {https://pubmed.ncbi.nlm.nih.gov/7263939/}, note = {Source identifier: 7263939} }