Frank E. Alden
Floyd, Margaret Henderson. Architecture after Richardson: Regionalism before Modernism--Longfellow, Alden, and Harlow in Boston and Pittsburgh. Chicago: U of Chicago in Association with the Pittsburgh History & Landmarks Foundation, 1994. Print.
Shettleworth, Earl G., Jr. Brief Biographies of American Architects Who Died between 1897 and 1947. Unpublished manuscript. Accessed 20 March 2017 on sah.org.