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Altus DE, Welsh TM, Miller LK, Merrill MH.Altus DE, et al. Among authors: miller lk.J Appl Behav Anal. 1993 Fall;26(3):403-4. doi: 10.1901/jaba.1993.26-403.J Appl Behav Anal. 1993.PMID: 8407689Free PMC article.
Altus DE, Welsh TM, Miller LK.Altus DE, et al. Among authors: miller lk.J Appl Behav Anal. 1991 Winter;24(4):667-75. doi: 10.1901/jaba.1991.24-667.J Appl Behav Anal. 1991.PMID: 1797770Free PMC article.