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[International news. Vol. 8, issue 85--excerpt. H.D. Campbell is presented with cup by President Coolidge for flying 250,000 miles without an accident--Washington, D.C.]
- ""World's safest aviator, Captain H.D. Campbell presented with cup by President Coolidge for flying 250,000 mile without an accident"--Hearst index card. Includes footage of airplane. Aviation story."
- "[International news. Vol. 8, issue 85--excerpt. H.D. Campbell is presented with cup by President Coolidge for flying 250,000 miles without an accident--Washington, D.C.]"