Showing 1 - 2 results of 2 for search 'Koch, Richard 1921-', query time: 0.01s Refine Results
  1. 1
    The 80/20 principle the secret of achieving more with less
    by Koch, Richard 1921-
    Published 1998
    Book
  2. 2
    The mentally retarded child and his family a multidisciplinary handbook
    Published 1971
    Other Authors: “…Koch, Richard 1921-…”
    Book
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