CIS U.S. Congressional Committee Hearings Index. Holland and Terrell Reference KF49 C62 U5x . Print index covers from 1833-1969.
U.S. Congress. Senate. Library. Cumulative Index of Congressional Committee Hearings (not confidential in character). Prior to January 3, 1935 in the United States Senate Library. (Supplements cover to 1980) Holland and Terrell U.S. Govt-Docs Y 1.3 H35/2 1935
U.S. Public Documents Office. Monthly Catalog of United States Government Publications. Holland and Terrell Reference U.S. Govt-Docs GP 3.8 and online
Search It (Search by author, title, subject and SuDocs number, not all hearings are available in Search It as you go farther back )
Congressional Information Service. CIS Index. Holland and Terrell Z 1223 Z7 C6