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1
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2od Stephens, Robert Eugene, 1905-“...National Bureau of Standards circular ;...”
Izdano 1942
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3
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4Izdano 1958“...National Bureau of Standards circular ;...”
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5
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7od Eiseman, John Hartshorn, 1897-“...National Bureau of Standards circular ;...”
Izdano 1934
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13
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14Izdano 1953“...National Bureau of Standards circular ;...”
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19Izdano 1950“...National Bureau of Standards circular ;...”
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