Allen, William F.2016-03-092016-03-091916-02https://hdl.handle.net/11299/177998University of Minnesota Ph.D. dissertation. February 1916. Major: Anatomy. 1 computer file (PDF); 76 pages.enAnatomyStudies on the Spinal Cord and Medulla of Cyclostomes with Special Reference to the Formation and Expansion of the Roof Plate and the Flattening of the Spinal CordThesis or Dissertation