1. Albite Mineral Data: http://webmineral.com/data/Albite..shtml.
2. Arzate, J.A., Flores, L., Chavez, R.E., Barba, l., Manzanilla, L., 1990. Magnetic prospecting for tunnels and caves. In Teotihuacan, Mexico. In: Ward, S.H. (Ed.), Geotechnical And Environmental Geophysics. vol. III. Geotechnical. Soc. Exploration Geophysicist, Investigations in Geophysics, vol. 5, Tulsa Oklahoma, pp. 155–162.
3. New studies in the building materials of Teotihuacan, Mexico;Barba;Mat. Res. Symp. Proc.,1995
4. Basalt, Minerals & rocks: http://www.casdn.neu.edu/~geology/department/staff/colgan/iceland/minerals/basalt.htm.
5. Calcite Mineral Data: http://webmineral.com/data/Calcite.shtml.