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  1. By: LaVal, Richard K. - Fitch, Henry S. (Henry Sheldon)
    Type: Article
    In: Occasional papers of the Museum of Natural History, the University of Kansas
    Volume: 69
    Date: 1977
    Page Range: 1--27
    Publication Info: Lawrence, Kan, The University, 1971-1994
  2. By: Turcios-Casco, Manfredo - Ávila-Palma, Hefer - LaVal, Richard K. - Stevens, Richard D. - Ordoñez Trejo, Eduardo Javier - Soler Orellana, José Alejandro - Ordoñez Mazier, Diego
    Type: Article
    In: Zoosystematics and Evolution
    Volume: 96
    Date: 2020
    Page Range: 411-429
    Publication Info: Pensoft Publishers 2020
  3. By: LaVal, Richard K.
    Type: Article
    In: Occasional papers of the Museum of Natural History, the University of Kansas
    Volume: 19
    Date: 1973-11-09
    Page Range: 1--47
    Publication Info: Lawrence, Kan, The University, 1971-1994