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Lua i Stíl Chicago (17ú heag.)Sittig, Marshall. Resistor Materials. Park Ridge, N.J: Noyes Data Corp, 1971.
Lua MLA (8ú heag.)Sittig, Marshall. Resistor Materials. Noyes Data Corp, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.