@article {731,
	title = {Tree Growth and Climatic Cycles},
	volume = {XXXVII},
	year = {1933},
	note = {Copies of this are available in the Tree Ring Laboratory. Please contact the curator for more information. pcreasman@ltrr.arizona.edu},
	keywords = {climate, climatic cycles, Douglass, environment, historic, tree growth, tree rings},
	author = {Douglass, A.E.}
}
@conference {709,
	title = {Tree Growth and Solar Cycles},
	booktitle = {Paper Presented at International Research Council},
	year = {1931},
	note = {Copies of this are available through the Tree Ring Laboratory. Please contact the curator for more information. pcreasman@ltrr.arizona.edu},
	keywords = {astronomy, Douglass, historic, solar cycles, tree growth},
	author = {Douglass, A.E.}
}
@article {787,
	title = {Solar Records in Tree Growth},
	volume = {LXV},
	year = {1927},
	keywords = {astronomy, Douglass, historic, records, solar, tree growth, tree ring},
	author = {Douglass, A.E.}
}
