- Estonian Organ Society: Rudolf Tobias - Biography in German and English with links to other Society pages including information on organs and organists.
- Jonah's Mission - Introduction to the composer and details of the composition of his oratorio on the reluctant prophet. The libretto is divided into separate pages, concluding with "The Sign of the Son of Man."
- Tobias, Rudolf - Includes biography, catalog of works, and discography in Estonian and English.
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