As pointed out by David (and others), College & Research Libraries is now freely available online six months after the original publication date. They’re back to 1997 now, which is further back than I get through Wilson Education Full Text (mid 1998). Some other nice tidbits from the press release:
"ACRL supports open access to scholarship as a principle for reform in
the system of scholarly communication. In addition to this new access
to College & Research Libraries, ACRL encourages author self-archiving of its published articles in both institutional and disciplinary repositories."