Drew, Allan P. 1973. ?Effects Of Light Preconditioning On The Seasonal Water Relations Of Nursery-Grown Douglas-Fir?. Forest Management. Forest Management. Oregon State University. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=759152371&sid=7&Fmt=1&clientId=43922&RQT=309&VName=PQD.

Drew, Allan P. 1967. ?Stomatal Activity In Semi-Arid Site Pnderosa Pine?. Watershed Management. Watershed Management. University of Arizona.