One can try a really novel idea and go to the library, where you will find the

Reader's Guide to Periodic Literature (Reference section),

where under motion pictures, reviews are listed by film title and journal. 

As far as the critics mentioned, Pauline Kael, Andrew Sarris, D. McDonald, 
their reviews have been anthologized in books, again available at most 
university libraries.

JC Horak

Online resources for film/TV studies may be found at ScreenSite