873 resultados para National Measurement System for Time and Frequency.


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Includes bibliographical references (p. 100-103).

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Bibliography: p. 45.

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Spine title: Detection of inflammable gas and vapour.

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Includes bibliographical references.

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"Presented at the 44th Annual Conference of the Water Pollution Control Federation, San Francisco, California (October, 1971)"--P. 1.

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