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  1. 1
    by Gould, Ralph Edgar, 1886-
    Published 1932
    “...National Bureau of Standards circular ;...”
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    Standard time throughout the world /
  2. 2
    by Gould, Ralph Edgar, 1886-
    Published 1935
    “...National Bureau of Standards circular ;...”
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    Standard time throughout the world.
  3. 3
    by Gould, Ralph Edgar, 1886-
    Published 1931
    “...National Bureau of Standards circular ;...”
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    Testing of timepieces.

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