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  1. 1
    by Burton, William Henry 1890-
    Published 1955
    Book

    Supervision, a social process
  2. 2
    by Barr, Arvil Sylvester 1892-
    Published 1947
    Book

    Supervision democratic leadership in the improvement of learning
  3. 3
    by Barr, Arvil Sylvester 1892-
    Published 1938
    Book

    Supervision principles and practices in the improvement of instruction
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