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Archival Materials
52
Letters (correspondence)
29
Articles
10
Laboratory notebooks
6
Excerpts
4
Drafts (documents)
3
Instructional Films and Videos
3
Lectures
3
Posters
3
Speeches
3
Popular Works
2
Animation
1
Announcements
1
Instructional Film and Video
1
Popular Work
1
Press releases
1
Testimonies
1