United States. Federal Supply Service. (1919). General schedule of supplies for fiscal year 1920, 1st supplement to class 1: Paper. GPO.
Chicago Style (17th ed.) CitationUnited States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1920, 1st Supplement to Class 1: Paper. [Washington]: GPO, 1919.
MLA (9th ed.) CitationUnited States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1920, 1st Supplement to Class 1: Paper. GPO, 1919.
Warning: These citations may not always be 100% accurate.