CIS index to unpublished US Senate committee hearings :
91st Congress-92nd Congress, 1969-1972 : 1913-1968 supplement, 63rd Congress-90th Congress.
APA Citation
Congressional Information Service. (1995). CIS index to unpublished US Senate committee hearings: 91st Congress-92nd Congress, 1969-1972 : 1913-1968 supplement, 63rd Congress-90th Congress. Bethesda, MD: Congressional Information Service.
MLA Citation
Congressional Information Service. CIS Index to Unpublished US Senate Committee Hearings: 91st Congress-92nd Congress, 1969-1972 : 1913-1968 Supplement, 63rd Congress-90th Congress. Bethesda, MD: Congressional Information Service, 1995.
Warning: These citations may not always be complete (especially for serials).