Many historical materials, including newspapers, remain accessible only on microfilm, and this is true for the earlier years of La Presse and Le Devoir:
La Presse (1884-1999) on microfilm
Le Devoir (1910-2013) on microfilm
Microfilm and other micro-photographic technologies became popular for preserving historical materials in the middle of the 20th c., and remain in use today. To access these materials, write to askyalelibrary@yale.edu and include the call number or link to the catalog record and any specific notes on which reels you would like to consult (e.g., reel numbers, years of publication). Library staff will retrieve the reels and place them on hold for you in Bass Library, where staff will also be available to assist you with using the microform readers that are currently located there.
Some of these collections include secondary and reference sources: