National standards for steamfitting apprenticeship. Including suggestions for putting national standards into operation in local communities.
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| Ente Autore: | |
|---|---|
| Natura: | Libro |
| Lingua: | inglese |
| Pubblicazione: |
Washington
1939
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| Serie: | U.S. Department of Labor. Division of Labor Standards. Bulletin
28,1 |
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- National Bureau of Standards monographs
- National Standard Reference Data Series