- Physical Description: 1 online resource (10 pages).
- Publisher: [Washington, D.C.] : U.S. Department of Commerce, National Bureau of Standards, 1934.
|General Note:|| Title from title screen (viewed June 17, 2016).
"Issued July 19, 1934."
|Bibliography, etc. Note:|| Includes bibliographical references.
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- National Bureau of Standards miscellaneous publication ; 145
- National Bureau of Standards miscellaneous publication ; 145.