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Subject (Topic)
- Mechanical drawing21
- Drafting and industrial drawings19
- Architecture--Designs and plans--Working drawings14
- Agricultural machinery--Design and construction9
- Mills and mill-work8
- Drawbridges7
- Agricultural instruments6
- Drafting and industrial drawings6
- Locks (Hydraulic engineering)6
- Naval architecture Designs and plans5
- Weights and measures5
- Naval architecture4
- Naval drafting4
- Agricultural instruments4
- Architecture--Designs and plans4
- Hydraulic engineering4
- African American women teachers3
- African Americans--Civil rights3
- African Americans--Education3
- Canals--Design and construction3