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- Yards and Docks Bureau354
- Yards and Docks Bureau (Navy Department)6
- Yards and Docks Bureau (Navy)279
- Yards and Docks, Bureau of4
- Yellow Fever Institute14
- Yellow Fever Institute (Public Health and Marine-Hospital Service, Treasury Department)1
- Yellowstone National Park21
- Yellowstone National Park (Interior Department)2
- Yellowstone National Park Boundary Commission1
- Yorktown Sesquicentennial Commission4
- Yosemite National Park17
- Yosemite National Park (Interior Department)2
- Yosemite National Park Commission1
- Youth Development Office5
- Youth Development and Delinquency Prevention Administration25