On My Own: The Impact of Semi-Independent Living Programs for Adults With Mental Retardation On My Own: The Impact of Semi-Independent Living Programs for Adults With Mental Retardation HalpernAndrew S., CloseDaniel W., and NelsonDebra J. (1986). Paul H. Brookes Publishing, PO Box 10624, Baltimore, MD 21285-0624. 189 pp., $15.95. · Study