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  1. By: Smithsonian Migratory Bird Center. - Greenberg, Russell - Reitsma, Robert
    Publication info: 1991-1992
    Holding Institution: Smithsonian Institution Archives
    Subjects: Chajul  Field notes  Mexico  migratory birds  Ornithology  
    BHL Collections: Smithsonian Field Books collection
  2. By: Smithsonian Migratory Bird Center. - Greenberg, Russell - Reitsma, Robert
    Publication info: 1991-1992
    Holding Institution: Smithsonian Institution Archives
    Subjects: Chajul  Field notes  Mexico  migratory birds  Ornithology  
    BHL Collections: Smithsonian Field Books collection
  3. By: Smithsonian Migratory Bird Center. - Greenberg, Russell
    Publication info: 1990-1991
    Holding Institution: Smithsonian Institution Archives
    Subjects: Chajul  Field notes  Mexico  migratory birds  Ornithology  
    BHL Collections: Smithsonian Field Books collection