United States. Federal Supply Service. (1919). General schedule of supplies for fiscal year 1920, 4th supplement to class 1: Paper, for period beginning Feb. 1, 1920, and ending June 30, 1920, both inclusive. GPO.
Chicago Style (17th ed.) CitationUnited States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1920, 4th Supplement to Class 1: Paper, for Period Beginning Feb. 1, 1920, and Ending June 30, 1920, Both Inclusive. [Washington]: GPO, 1919.
MLA (9th ed.) CitationUnited States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1920, 4th Supplement to Class 1: Paper, for Period Beginning Feb. 1, 1920, and Ending June 30, 1920, Both Inclusive. GPO, 1919.
Warning: These citations may not always be 100% accurate.