Mills)的懷橡樹(英语:Wye Oak)(Wye Oak),已於2002年在雷暴中遭擊倒,據估計已有450多年的歷史;而紐澤西州巴斯金里奇(英语:Basking Ridge, New Jersey)的老橡樹(英语:Old Oak Tree),估計已有600多年的歷史,據說為美國最古老的橡木,該樹的根部圓周長25英尺(7
University of NorthCarolina Press, 2001. ISBN 0-8078-2624-3. Pfanz, Harry W. Gettysburg – The Second Day. Chapel Hill: University of NorthCarolina Press, 1987
1985,第443–446頁. Wilcox Jr., William J. EARLY DAYS OF OAKRIDGE AND WARTIME Y-12 (PDF). OakRidge Heritage and Preservation Association. 2007-11-11 [2021-02-09]