Wright, Robert Dennison. 1963. ?Some Ecological Studies On Bristlecone Pine In The White Mountains Of California?. Plant Science. Plant Science. University of California. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com.ezproxy2.library.arizona.edu/pqdweb?did=763335561&sid=2&Fmt=1&clientId=43922&RQT=309&VName=PQD.