What makes a source primary?
Primary sources are original documents and objects which were created at the time. Typical examples include letters, diaries, photos, newspaper articles, eyewitness accounts, autobiographies, government reports, paintings, maps, etc. In actuality, it can be more complicated and can depend on the topic/time period.
Always clarify with your professor.
CEEOL Central and Eastern European Online Library
A collection of primary sources, not all of them in English.
EastView Universal Databases
A rich collection of digital materials including Russian newspapers (in Russian), newswires (in English), government documents (in Russian), secondary books, secondary popular and scholarly articles (in English), and other materials. Best for late 20th-21st century topics.
Collected Works of Karl Marx, Frederick Engels
50 volumes. Includes published works as well as correspondence.
Revolution, democracy, socialism: selected writings by V.I. Lenin
Browse footnotes and bibliographies of books, encyclopedias, and articles for information about primary sources.
Search the Library Catalog for primary sources--both unpublished manuscripts and modern editions in print and online, sometimes in translation, of original primary sources. Use the advanced search with keywords related to your topic (such as Russia Revolution) and terms like:
description and travel
Then apply language limits. That will result in such translated items as:
Voices of revolution, 1917 (2001) Olin Library DK265 .A544 2001
Competing voices from the Russian Revolution (2011) Olin Library DK265 .A5165 2011