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  1. By: Simpson, George Gaylord,
    Publication info: New York City, The American Museum of Natural History, [1941]
    Holding Institution: American Museum of Natural History Library
    Subjects: Apataelurus  Carnivora, Fossil  Cuspids  Evolution  Saber-toothed tigers  Teeth  Thylacosmilus
  2. By: Simpson, George Gaylord, - Thomson, Albert
    Publication info: New York City, The American Museum of Natural History, [1941]
    Holding Institution: American Museum of Natural History Library
    Subjects: Hoplophoneus  Mammals, Fossil  Oligocene  Paleontology  Saber-toothed tigers  South Dakota  West (U.S.)