Where do you find GOOD criticism of older (pre-internet) books?

I was looking for proper reviews of Peter Handkes "A Sorrow Beyond Dreams" (1972) on different search engines, but didn't immediately see any non-contemporary writing.

Where do you go to find good criticism of books written back in the day before internet? Do you search the archives of publications like The New Yorker and London Review of Books separately?

This goes for the classics too. Where do you go to find the best archived reviews of great but popular books? Without the work of digging through all the irrelevant SEO-optimized blogs?

Of course there's the occational retrospective longreads which often hits the spot, but I'd like to break out of the present once in a while.