Flint, Delos E.; de Albear, Jesus Francisco & Guild, Philip White. Geology and Chromite Deposits of the Camagüey District, Camagüey Province, Cuba, report, 1948; (https://digital.library.unt.edu/ark:/67531/metadc304391/m1/1/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .