Sort By:
  1. Pennsylvanian invertebrates of the Mazon Creek Area, Illinois: the morphology and affinities of Tullimonstrum /
    By: Johnson, Ralph Gordon, - Richardson, Eugene Stanley,
    Publication info: [Chicago] :Field Museum of Natural History ,1969.
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Illinois  Paleontology  Pennsylvanian  Tullimonstrum  
    View Book