Resources about William Davis McCullough
 Polk's Indianapolis (Marion County, Ind.) city directory, 1914
| Polk's Indianapolis (Marion County, Ind.) city directory, 1915
| Detroit Free Press, Apr. 22, 1917 |
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Detroit Free Press, Jun. 17, 1923
| Detroit Free Press, Jul. 22, 1929 | Detroit Free Press, Mar. 7, 1937
| Arizona Republic, Mar. 23, 1937
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Death Certificate, 1940
| Detroit Free Press, Jun. 1 1940 |
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