- [S2309] Geneology of The Bisbee Family (I) - Viola Drake Bisbee, Viola Drake Bisbee, compiler, (June 2000, Bisbee Family Connection, Decatur, MI), p. 130.
- [S1225] Two Brothers in the Pennsylvania Triangle, Margaret Jane Dunnihoo, (Erie, Pennsylvania: self published, 1974.), p. 24.
- [S2754] Find A Grave Internet Website, www.findagrave.com, Memorial #10384727 for Clifford Lawrence Proper.
- [S1534] Social Security Death Index - Ancestry, (www.ancestry.com, 2007: Social Security Administration, Social Security Death Index, Master File), entry for Clifford Proper, 1983, SS no. 206-09-6136.
Last Residence: 16407 Corry, Erie, Pennsylvania
Born: 23 Dec 1908
Died: Dec 1983
State (Year) SSN issued: Pennsylvania (Before 1951)
- [S2079] Dey, William James (I2557): 1910 US Census, (www.ancestry.com (2006): National Archives and Records Administration micropublication T624, roll 1341; enumeration district (ED) 57, sheet 8B, page 107B, line 61, dwelling 185, family 190; image downloaded 11/4/208.), 1910-Amity.57.16.jpg.
- [S2475] Proper, James Ray (I196): 1920 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication T625, roll 1565, enumeration district (ED) 60, sheet 1A, page 17A, line 32, dwelling 8, family 8; image accessed 1/6/2009.), 1920.PA.Erie.Amity.60.1.
- [S2477] Proper, Clifford (I197): 1930 US Census, (www.ancestry.com (2002): National Archives and Records Administration micropublication T626, roll 1435, enumeration district (ED) 436, sheet 6A, page 179A, line 12, dwelling 123, family 127; image accessed 1/6/2009.), 1930.NY.Erie.Marilla.436.11.
- [S1536] Death, Erie Times, (Erie, Pennsylvania), Obituary, May 22, 1975.
- [S2887] New York Marriages, (Ancestry.com), Marriage License for Clifford Proper & Edith Bromley filed at Clymer, New York.