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1
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2
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3
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4Published 1928“...National Bureau of Standards circular ;...”
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5Published 1951“...National Bureau of Standards circular ;...”
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6
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7Published 1940“...National Bureau of Standards circular ;...”
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8Published 1929“...National Bureau of Standards circular ;...”
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9Published 1929“...National Bureau of Standards circular ;...”
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10Published 1953“...National Bureau of Standards circular ;...”
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11Published 1920“...National Bureau of Standards circular ;...”
Conference Proceeding Book