MalmströmVincent H., “Origin of the Mesoamerican 260-day Calendar”, Science, clxxxi (1973), 759–60.
2.
EricJ.ThompsonS., Maya hieroglyphic writing: An introduction (Norman, Oklahoma, 1960), 98.
3.
NuttallZelia, “Nouvelles lumières sur les civilisations americaines et le système du calendrier”, Proceedings of the Twentysecond International Congress of Americanists (Rome, 1928), 119–48, p. 119.
4.
ApenesOla, “Possible Derivation of the 260 Day Period of the Maya Calendar”, Ethos (Stockholm), i (1936), 5–8.
5.
MerrillR. H., “Maya Sun Calendar Dictum Disproved”, American antiquity, x (1945), 307–11.
6.
MorleySylvanus G., The ancient Maya (Stanford, California, 1946), 59.
7.
GadowH. F., Travels through Southern Mexico (New York, 1908).
8.
CasoAlfonso, Los Calendarios Prehispanicos (Mexico [City], 1967), 77.
9.
Thompson, Maya hieroglyphic writing, 152.
10.
EkholmSusanna M., “Mound 30a and the Early Preclassic Ceramic Sequence of Izapa, Chiapas, Mexico”, Number 25, Papers of the New World Archaeological Foundation (Provo, Utah, 1969), 1.
11.
SorensonJohn L., “A Mesoamerican Chronology: April 1977” (mimeographed: Brigham Young University, Provo, Utah, 1977), Fig. 1.
12.
LoweGareth W., “The Early Preclassic Barra Phase of Altamira, Chiapas: A Review with New Data”, Number 38, Papers of the New World Archaeological Foundation (Provo, Utah, 1975), 13–14.
13.
CoeMichael D., America's first civilization (New York, 1968), 79.
14.
Ibid., 53.
15.
AveniAnthony F. (ed.), Archaeoastronomy in Pre-Columbian America (Austin, Texas, 1975), 4–5.
16.
It is, nonetheless, the explanation cited in many sources. See, for example, HeydenDoris and GendropPaul, Pre-Columbian architecture of Mesoamerica (New York, 1975), 39.
17.
Aveni, op. cit. (ref. 15), 169.
18.
AveniAnthony F. (ed.), Native American astronomy (Austin, Texas, 1977), 5.
19.
Aveni, op. cit. (ref. 15), 170–1.
20.
Personal communication.
21.
HardoyJorge, Urban planning in Pre-Columbian America (New York, 1968), 27.
