This primary source comes from the Records of the U.S. Senate.
Full Citation: Resolution Adopted by Suffragetts of Fifth Congressional District of Michigan, Favoring Rankin Bill for Investigation Concerning Treatment of Suffragetts at Occoquan; 4/19/1918; Petitions and Memorials, Resolutions of State Legislatures, and Related Documents which were Presented, Read, or Tabled during the 65th Congress; (SEN65A-K11); Petitions and Related Documents That Were Presented, Read, or Tabled, 1789 - 1966; Records of the U.S. Senate, Record Group 46; National Archives Building, Washington, DC. [Online Version, https://www.docsteach.org/documents/document/fifth-district-michigan-suffrage, April 26, 2024]