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  1. By: Hoogstraal, Harry, - Valdez, Raul
    Publication info: [Chicago], Field Museum of Natural History, 1980
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Young, Kendal E., - Thompson, Bruce Carlyle, - Terrazas, Alberto Lafón - Montoya, A B - Valdez, Raul
    Type: Article
    In: The journal of raptor research
    Volume: 38
    Issue: 2
    Date: 2004
    Page Range: 107--117
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Young, Kendal E., - Zwank, Phillip J., ‏ - Valdez, Raul - Dye, J L - Tarango Arámbula, Luis Antonio
    Type: Article
    In: The journal of raptor research
    Volume: 31
    Issue: 4
    Date: 1997
    Page Range: 376--380
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Thomaides, Christos - Valdez, Raul - Reid, W H - Raitt, Ralph J.
    Type: Article
    In: The journal of raptor research
    Volume: 23
    Issue: 2
    Date: 1989
    Page Range: 42--44
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  4. By: Frisina, Michael R - Valdez, Raul - Ulziimaa, Gombosuren
    Type: Article
    In: The journal of the Bombay Natural History Society
    Volume: 101
    Date: 2004
    Page Range: 353--359
    Publication Info: Bombay Bombay Natural History Society 1886-
  5. By: Tarango Arámbula, Luis Antonio - Valdez, Raul - Clemente-Sánchez, Fernando - Mendoza, German
    Type: Article
    In: The journal of raptor research
    Volume: 35
    Issue: 2
    Date: 2001
    Page Range: 165--168
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-