Biblio
“Dendrochronology And Studies In Cyclics”. University Of Pennsylvania Bicentennial Conference Proceedings. University Of Pennsylvania Bicentennial Conference Proceedings.
. Douglass, AE_Dendrochronology and Studies in Cyclics.pdf (21.08 MB)“Evidences Of Cycles In Tree Ring Records”. Proceedings Of The National Academy Of The Sciences. Proceedings Of The National Academy Of The Sciences.
. 1933. Douglass, AE_Evidences of Cycles in Tree RIng Records_1933.pdf (11.71 MB)“Reports On The Conferences Of Cycles”. Washington, D.C. : Carneige Institution.
. 1929. Carnegie Institution of Washington_Reports on the Conferences of Cycles_1929.pdf (31.03 MB)