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- Helfrick, Albert D.
Helfrick, Albert D. (Nombre personal)
Used for/see from:
- Helfrick, Albert
His Amateur radio equipment fundamentals, c1982: t.p. (Albert D. Helfrick, Cessna Aircraft)
His Modern aviation electronics, 1984: CIP t.p. (Albert Helfrick) data sheet (b. 1945)