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Biographical Directories:
Entry in Henry F. Withey, A.I.A., and Elsie Rathburn Withey, Biographical Dictionary of American Architects (Deceased) (Los Angeles: New Age Publishing Company, 1956. Facsimile edition, Hennessey & Ingalls, Inc., 1970)
Entry in Macmillan Encyclopedia of Architects (New York: Macmillan, 1982)
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The American Institute of Architects Archives
Membership file contains correspondence from 1917-1918 concerning ethics and retirement status, and obituary clippings sent in by his firm. A 1901 letter from another St. Joseph firm, Felt and Carr, regarding possible AIA membership, includes a complaint about Eckel's fees.
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