The most comprehensive source of committee prints is ProQuest Congressional:
If you are not a current UCLA student, faculty, or staff member, and cannot come to the UCLA campus to access ProQuest Congressional from the UCLA wireless or library computers, you can access PDFs of some committee prints for free online:
Finally, some committee prints are available in print on the law library's A Level (basement), as part of the collection of government documents arranged by the government's special SuDoc numbering system. Committee prints are listed under SuDoc numbers starting with Y4.