Key points are not available for this paper at this time.
The Maya Indians of southern Yucatan and northern British Honduras. By Thomas W. F. Gann. Smithsonian institution, bureau of American ethnology, bulletin 64 (Washington: Government printing office, 1918. 146 p.) Get access Journal of American History, Volume 6, Issue 3, December 1919, Page 431, https://doi.org/10.2307/1886362 Published: 01 December 1919
Thomas Gann (Mon,) studied this question.