Rose F. Kennedy Center for Research in Mental Retardation and Human Development, National Institute of Child Health and Human Development (U.S.). Mental Retardation Branch, Purpura, D. P., & Reaser, G. P. (1973). Methodological approaches to the study of brain maturation and its abnormalities: Summary report. University Park Press.

Rose F. Kennedy Center for Research in Mental Retardation and Human Development, National Institute of Child Health and Human Development (U.S.). Mental Retardation Branch, Dominick P. Purpura, a Georgia Perkins Reaser. Methodological Approaches to the Study of Brain Maturation and Its Abnormalities: Summary Report. [Baltimore: University Park Press, 1973.

Rose F. Kennedy Center for Research in Mental Retardation and Human Development, et al. Methodological Approaches to the Study of Brain Maturation and Its Abnormalities: Summary Report. University Park Press, 1973.