United States. Personnel Classification Board & ProQuest (Firm). (1931). Preliminary class specifications of positions in the field service, Field Survey Division, Personnel Classification Board. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Personnel Classification Board and ProQuest (Firm). Preliminary Class Specifications of Positions in the Field Service, Field Survey Division, Personnel Classification Board. Washington: [publisher not identified], 1931.
MLA (9th ed.) CitationUnited States. Personnel Classification Board and ProQuest (Firm). Preliminary Class Specifications of Positions in the Field Service, Field Survey Division, Personnel Classification Board. [publisher not identified], 1931.
Warning: These citations may not always be 100% accurate.