United States. Congress. Senate. Committee on the District of Columbia & ProQuest (Firm). (1939). Regulate the practice of professional engineering and create a board for licensure of professional engineers in and for the District of Columbia. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on the District of Columbia and ProQuest (Firm). Regulate the Practice of Professional Engineering and Create a Board for Licensure of Professional Engineers in and for the District of Columbia. Washington: [publisher not identified], 1939.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on the District of Columbia and ProQuest (Firm). Regulate the Practice of Professional Engineering and Create a Board for Licensure of Professional Engineers in and for the District of Columbia. [publisher not identified], 1939.