Robertson, J. "Invariant Behavior in the Formation of the Grammatical Category POLIET/FAMILIAR: A Mayan/Indo-European Comparison, "submitted to International Journal of American Linguistics, plus England's peer review and letter to the editor,, 1984

Robertson, J. "Invariant Behavior in the Formation of the Grammatical Category POLIET/FAMILIAR: A Mayan/Indo-European Comparison, "submitted to International Journal of American Linguistics, plus England's peer review and letter to the editor,, 1984, Box: 4, Folder: 11. Nora England Papers, 2023-17. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/395264 Accessed September 26, 2026.