Bibliotheca Buddhica of the Russian Academy of Sciences
The Institute of Oriental Manuscripts of the Russian Academy of Sciences, St. Petersburg, has made Bibliotheca Buddhica freely available online.
Bibliotheca Buddhica (Buddhist Library) is a thirty-volume series of rare Buddhist texts, whose writing was started in 1897 by Indologists Fyodor Shcherbatskoy and C. U. Oldenburg in the Russian Academy of Sciences in St. Petersburg and was completed in 1937.
See and download the texts of the Bibliotheca Buddhica in pdf format HERE