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Subject
- Nightingale1
- Nitrate industry--Chile--History1
- Orchards1
- Paper industry--Massachusetts2
- Pulque industry--Mexico--History1
- Quarries and quarrying--New Hampshire1
- Quarries and quarrying--Vermont2
- Railroads--Peru1
- Railroads--South America1
- Rivers--Africa, East--Pictorial works1
- Salt industry and trade1
- Salt industry and trade--New York (State)1
- Sheep--Pictorial works1
- Silk industry3
- Steel industry and trade--Pennsylvania--Pittsburgh--History1
- Sugar industry2
- Valleys--Switzerland--Pictorial works1
- Waterfalls--Argentina1
- Wool industry--Massachusetts--Lawrence2
- Yarn1