Subject (Genre)
- Textbooks79
- History74
- Alexander Street Video73
- Biography72
- Instructional television programs70
- Documentary television programs67
- Legislative Report - Public Bills67
- Congress66
- Handbooks and manuals63
- Filmed lectures62
- Names Lists59
- Juvenile literature58
- proceedings (reports)54
- Short films53
- Tables51
- Laboratory manuals49
- Early works46
- Film clips41
- Executive Department Publications36
- Bibliographies32