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  1. By: Zakrzewski, Richard J.
    Type: Article
    In: Contributions in science
    Volume: 221
    Date: 1972-02-16
    Page Range: 1--12
    Publication Info: Los Angeles, Calif, The Museum, [1957]-
  2. By: Zakrzewski, Richard J.
    Type: Article
    In: Annals of the Carnegie Museum
    Volume: 45
    Date: 1975-11-17
    Page Range: 255--261
    Publication Info: [Pittsburgh], Published by authority of the Board of Trustees of the Carnegie Institute, 1901-