Iniguez, Jose M. 2006. ?Landscape Fire History And Age Structure Patterns In The Sky Islands Of Southeastern Arizona?. School Of Natural Resources. School Of Natural Resources. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=1144189411&sid=5&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Pedicino, Lisa Christina. 1997. ?Carbon Isotopic Variations In 7 Southwestern U.s. Plants From Herbarium Collections Of The Last 150 Years?. School Of Renewable Natural Resources. School Of Renewable Natural Resources. University of Arizona.