@misc{indiciaee056c8f4c251, title = {A PROCEDURE FOR REDUCING EXPERIMENTAL DROP-OUTS.}, author = {A E KAUFMAN}, year = {1964}, doi = {10.1901/jeab.1964.7-400}, url = {https://pubmed.ncbi.nlm.nih.gov/14238905/}, note = {Source identifier: 14238905} }