United States. Congress. House. Committee on Post Office and Post Roads & ProQuest (Firm). (1928). Contract for transportation of mails by air to foreign countries. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Contract for Transportation of Mails by Air to Foreign Countries. Washington: [publisher not identified], 1928.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Contract for Transportation of Mails by Air to Foreign Countries. [publisher not identified], 1928.
Warning: These citations may not always be 100% accurate.