1. Add MS 82506 A-Z Reference (shelfmark): Add MS 82506 A-Z Title: Keyes Papers. Vol. cxxxiv a-z. Printed material relating to Operations ZO and VS; 1918-1943, n.d. Collection Area: Western Manuscripts Languages: English Date Range: 1918-1943 Extent: 1 item
2. Add MS 82500 A-F Reference (shelfmark): Add MS 82500 A-F Title: Keyes Papers. Vol. cxxviii a-f. Operation ZO personnel; 18 Feb. 1918 – 1921, n.d. Collection Area: Western Manuscripts Languages: English Date Range: 18 Feb 1918-1921 Extent: 1 item
3. Add MS 82505 A-D Reference (shelfmark): Add MS 82505 A-D Title: Keyes Papers. Vol. cxxxiii a-d. Operation ZO/VS maps, plans, charts, and drawings; 1915-1918. Collection Area: Western Manuscripts Languages: English Date Range: 1915-1918 Extent: 4 items
4. Add MS 82504 A-D Reference (shelfmark): Add MS 82504 A-D Title: Keyes Papers. Vol. cxxxii a-d. Reports on, and histories of, the Dover Patrol and Operation ZO; 29 April 1917– 14 Sept. 1930. Collection Area: Western Manuscripts Languages: English Date Range: 29 Apr 1917-14 Sep 1930 Extent: 4 items