Version history for: Davis, George H., 2003, Tentative correlation between CIPW normin pl (total plagioclase) and Los Angeles wear in Precambrian midcontinental granites -- examples from Missouri and Oklahoma, with applications and limitations for use, in Bliss, J.D., Moyle, P.R., and Long, K.R., eds., Contributions to industrial-minerals research: U.S. Geological Survey Bulletin 2209-G, 17 p. Version 1.0, August 16, 2004 Initial release online at http://pubs.usgs.gov/bul/b2209-g/