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Publication
1909 - Govt. print. off., Washington, District of Columbia
Language
English
Word Count
7,750 words, Guess
Page Count
31 pages
Identifiers
- Open LibraryOL61445520M
- OCLC Control Number31122223
- Library of Congress Control Number12017165
Classifications
- LCCQC100 .U555 no.20
Subjects
Topics
Series Statement
- Circular of the Bureau of standards -- no. 20
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