TC 9-237 Operator's Circular: Welding Theory and Application
U.S. Department of the Army (official armypubs.army.mil copy)
Complete welding textbook: safety, joint design, arc/oxy-fuel processes, metal identification, electrodes, field-expedient maintenance welding — the definitive redistributable welding reference.
Editor's notes
1993 edition; equipment references are dated but core technique/safety content remains sound. URL verified live (HTTP 200, application/pdf).
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US federal government work (public domain, 17 USC 105); distribution statement: approved for public release, distribution unlimited.
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