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Richard G. Weingardt, P.E., Dist.M.ASCE, F.ACEC, D.Sc.h.c. Joachim Gotsche Giaver. STRUCTURE. National Council of Structural Engineers Associations. 2012-06 [2014-06-30]. (原始内容存档于2014-06-30).
Joseph, Rebecca M.; Brooke Rosenblatt; Carolyn Kinebrew. The Black Statue of Liberty Rumor. National Park Service. 2000-09 [2014-08-10]. (原始内容存档于2014-07-01).
Abolition. National Park Service. [2014-08-10]. (原始内容存档于2014-07-14).
Richard G. Weingardt, P.E., Dist.M.ASCE, F.ACEC, D.Sc.h.c. Joachim Gotsche Giaver. STRUCTURE. National Council of Structural Engineers Associations. 2012-06 [2014-06-30]. (原始内容存档于2014-06-30).