United States. Congress. Senate. Committee on Post Offices and Post Roads & ProQuest (Firm). (1939). Limiting working hours of pneumatic-tube system employees to 8 in 10 hours a day. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Post Offices and Post Roads and ProQuest (Firm). Limiting Working Hours of Pneumatic-tube System Employees to 8 in 10 Hours a Day. Washington: [publisher not identified], 1939.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Post Offices and Post Roads and ProQuest (Firm). Limiting Working Hours of Pneumatic-tube System Employees to 8 in 10 Hours a Day. [publisher not identified], 1939.
Warning: These citations may not always be 100% accurate.