Sheppard, Paul. 1995. ?Reflected-Light Image Analysis Of Conifer Tree Rings For Dendrochronological Research?. Geosciences. Geosciences. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=742087251&sid=3&Fmt=2&clientId=43922&RQT=309&VName=PQD.