872 resultados para grading standards


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"The 29th meeting of the MFPG and these proceedings were sponsored by the Center for Materials Science of the National Bureau of Standards ... [et al.]"

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Sponsored by National Bureau of Standards, Institute for Materials Research, Office of Air and Water Measurement.

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Some numbers issued in revised editions.

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At head of title: U. S. Dept. of agriculture, Bureau of agricultural economics.

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Mimeographed.