Places to look for Congressional hearings and committee prints:
ProQuest Congressional Publications includes the following types of full text documents:
Serial Set, 1789-present
The published working papers of Congress. It includes hundreds of thousands of House and Senate reports, State of the Union messages, Congressional journals, hearings, high-resolution maps, and more.
Congressional hearings, 1980-2003
All published and many unpublished hearings from all Congressional committees.
Congressional Record and precursors, 1789-present
The published proceedings of activities on the floor of Congress.
House. Committee on Foreign Affairs (Y 4. F 76/1:)
Senate. Committee on Foreign Relations (Y 4.F 76/2:)
House. Committee on International Relations (Y4. In8/16:)
Commission on Security and Cooperation in Europe (Y 4.SE 2:)