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The Ogden Standard-Examiner

Ogden, Utah • dim. 17 févr. 1957Page 7

Krypton-85 powered railroad signal light made in D&RGW Labs, Colorado (1957)

Krypton-85 powered railroad signal light made in D&RGW Labs, Colorado (1957)

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Krypton-85 powered railroad signal light made in D&RGW Labs, Colorado (1957)

Krypton-85 powered railroad signal light made in D&RGW Labs, Colorado (1957)

The Ogden Standard-Examiner

Ogden, Utah • dim. 17 févr. 1957Page 7

The Ogden Standard-Examiner

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