United States. Congress. House. Committee on Post Office and Post Roads & ProQuest (Firm). (1927). Steel railway post-office cars. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Steel Railway Post-office Cars. Washington: [publisher not identified], 1927.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Steel Railway Post-office Cars. [publisher not identified], 1927.
Warning: These citations may not always be 100% accurate.