TY  - RPRT
TI  - Anasazi solar marker: The use of a natural rockfall
AU  - E. B. Newman
AU  - R. K. Mark
AU  - R.G. Vivian
PY  - 1982
DO  - 10.1126/science.217.4564.1036
UR  - https://pubs.usgs.gov/publication/70011456
ID  - 70011456
ER  -