Não informado. (1963). Ball and Roller Bearing Engineering. Fag kugelfischer Georg Schafer.
Lua i Stíl Chicago (17ú heag.)Não informado. Ball and Roller Bearing Engineering. Schweinfurt, Alemanha: Fag kugelfischer Georg Schafer, 1963.
Lua MLA (8ú heag.)Não informado. Ball and Roller Bearing Engineering. Fag kugelfischer Georg Schafer, 1963.
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