Note IX-20 — Chapter IX · ANTIQUITIES OF THE CENTRAL PLATEAUX.
Reading edition
Dupaix, 1st exped., pp. 10-11, pl. xiii.-v., fig. 14-16; Kingsborough, vol. v., p. 218; vol. vi., p. 427, vol. iv., pl. viii., fig. 17-18; Lenoir, in Antiq. Mex., tom. ii., div. i., pp. 23, 30.