^Philip C. Curtis Sound and Silence, Editor Bille Wikre, Albion College. 2007.
^Philip C. Curtis Sights & Sounds, editor Bille Wikre, Albion College cited from Nelda Crowell, "Philip Curtis: Artist with No Regrets," Arthritis Frontiers, October 1979, 5.
^Philip Curtis interviewed by Edward Lebow, unpublished manuscript, 1990.
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