1. New group of nerve-cells in the spinal cord of the frog (Rana pipiens and Rana halecina) Author(s): Mason, John J., author Publication: [New York?] : [publisher not identified], [1879?] Subject(s): Spinal Cord -- cytologyRanidae
2. Microscopic studies on the central nervous system of reptiles and batrachians: the spinal cord of the frog, Rana pipiens, Rana halecina Author(s): Mason, John J., author Publication: Chicago : J.J. Spalding & Co., printers, 1880 Subject(s): Spinal Cord -- cytologyRanidae -- anatomy & histologyMicroscopy
