Look for the "Find Fulltext at GC" link next to each result. Use that link to get the full text via the library's resources.
Tip: You can link your Google account to the GC, so the “Find Fulltext at GC” links will always appear – even if you don’t start your search from this page. Go to our customized settings screen and click Save. If you’re logged into a Google account, it will remember that setting from now on.