Germans from Russia Heritage Collection from the North Dakota State University Libraries Website
Germans from Russia Heritage Society
American Historical Society of Germans From Russia
Migration from the Russian Empire [on this website]
Discusses the online database which indexes Russian passengers to New York, 1834-1897, including Germans from Russia.
The Volga Germans
Volga German Institute from the University of North Florida
Odessa Digital Library a German-Russian Genealogical Library -- contains numerous databases related to Germans from Russia