Westlaw and LexisNexis did not begin to put most full-text Congressional committee reports online until 1990. However, Westlaw does have selected reports for U.S. Public Laws beginning with 1948.
On Westlaw, select the LH database and search by public law number, e.g. to(90-351), or report number, e.g. ci(90-1097). West's U.S. Code Congressional and Administrative News in print also has selected committee reports back to 1948, organized by public law number.
On LexisNexis, browse the Source directory to Legal > Federal Legal - U.S. > Legislative Histories & Materials and search by report number: rpt# (105-208)
There are other resources for U.S. legislative history that we will cover later in the semester, but no online resource has any more full-text committee reports. See United States Statutes and Other Legislative Resources.
If you need older Congressional committee reports, ask a reference librarian to help you find it on microfiche.