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- 4-H clubs2
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- African American men3
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- Agricultural chemicals1
- Agricultural chemicals industry1
- Agricultural exhibitions1
- Agriculture1
- American Association of Petroleum Geologists5
- American Institute of Laundering1
- Assembly-line methods3
- Autoclaves1
- Bailey, Elizabeth1
- Bechtold, Joe1
- Beckman Instruments, Inc.2
- Bell, Percy L.1
- Best, Mildred1
- Bodie, Pat1
- Booth, Elizabeth1