An archive of post-tournament ratings for every player from every rated blitz tournament ever played in Montreal from December 1970 to December 1998.
The file contains 41,172 records, and is in a 276k zip file, which expands to 1.7 meg. It is sorted by last name.
Note that prior to 1982, each chess club had a seperate rating, thus players playing at different clubs on/near the same dates may have had vastly different ratings.
Here is the layout of the file.