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  1.  12
    Tool use in profoundly retarded humans: A method of subgrouping.Charles C. Cleland, William V. Rago & Ajit Mukherjee - 1978 - Bulletin of the Psychonomic Society 12 (1):86-88.
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  2.  20
    Mortality and important events: Another look.William V. Rago, Mark Mason & Charles C. Cleland - 1981 - Bulletin of the Psychonomic Society 17 (2):76-78.
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  3.  18
    Relationship between the frequency of touching and status in institutionalized profoundly retarded.William V. Rago & Charles C. Cleland - 1978 - Bulletin of the Psychonomic Society 11 (4):249-250.