Douglas, Arthur Vern. 1976. ?Past Air-Sea Interactions Over The Eastern North Pacific Ocean As Revealed By Tree-Ring Data?. Geoscience. Geoscience. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=760943281&sid=5&Fmt=1&clientId=43922&RQT=309&VName=PQD.

Douglas, Arthur Vern. 1973. ?Past Air-Sea Interactions Off Southern California As Revealed By Coastal Tree-Ring Chronologies?. Geoscience. Geoscience. University of Arizona.