Stovall, J. Willis; Savage, Donald E. (October 1939). "A Phytosaur in Union County, New Mexico with Notes on the Stratigraphy". The Journal of Geology. 47 (7): 759–766. Bibcode:1939JG.....47..759S. doi:10.1086/624832. S2CID128592690.
harvard.edu
ui.adsabs.harvard.edu
Stovall, J. Willis; Savage, Donald E. (October 1939). "A Phytosaur in Union County, New Mexico with Notes on the Stratigraphy". The Journal of Geology. 47 (7): 759–766. Bibcode:1939JG.....47..759S. doi:10.1086/624832. S2CID128592690.
nmt.edu
geoinfo.nmt.edu
Baldwin, Brewster; Muehlberger, W.R. (1959). "Geologic studies of Union County, New Mexico"(PDF). New Mexico Bureau of Mines and Mineral Resources Bulletin. 63 (2). Retrieved 1 September 2020.
Stovall, J. Willis; Savage, Donald E. (October 1939). "A Phytosaur in Union County, New Mexico with Notes on the Stratigraphy". The Journal of Geology. 47 (7): 759–766. Bibcode:1939JG.....47..759S. doi:10.1086/624832. S2CID128592690.