Explanatory Note.

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Bibliographic Details
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Corporate Author: United States. National Bureau of Standards
Other title:At head of title: Supplement to Bureau Circular no. 38.
Format: Government Document Book
Language:English
Published: Washingtion, D.C. : U.S. G.P.O., 1912.
Series:Circular of the Bureau of Standards ; no. 38 supp.
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