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Standard time throughout the world. (Issued March 20, 1935). (Circular of the National bureau of standards, C 406)

Standard time throughout the world. (Issued March 20, 1935). (Circular of the National bureau of standards, C 406)
Paper図書
U.S. Govt. print. off.1935.<VF6-PY24>
National Diet Library
  • Author HeadingUnited States. National Bureau of Standards. Gould, Ralph Edgar, 1886-

Testing of timepieces. Issued June 18, 1931. (United States. Bureau of Standards. Circular, no. 392)

Testing of timepieces. Issued June 18, 1931. (United States. Bureau of Standards. Circular, no. 392)
Paper図書
U.S. Govt. Print. Off.1931.<VF6-Y677>
National Diet Library
  • Author HeadingGould, Ralph Edgar, 1886-

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