1. Helms RW. Entering Data from Remote Terminals in Clinical Centers using IBM’s OS/TSO in the Kidney Transplant Histocompatibility Study. Technical Report 007. Chapel Hill, NC: University of North Carolina, KTHS Statistics and Data Management Center, Department of Biostatistics; 1973.
2. Mitchell HE. Distributed Management and Processing of Multicenter Data. Presented at the American Statistical Association, Philadelphia, PA, August 1984.
3. Kish L. Survey Sampling. New York: John Wiley & Sons; 1965.
4. Rosner B. Fundamentals of Biostatistics. New York: Duxbury Press; 1995.