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Federal Aid Project viaduct,
Pawnee County - 1910's |
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Railroad crossing, Meadow Grove-Tilden,
showing accident prevention experiment - 1920's |
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5-car gravel train,
Central City-Chapman - 1921 
North Platte - 1930's
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Dedication of viaduct,
Grand Island - 1932 
Railroad crossing in Potter
1940
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