Não informado. (1960). Analyzer. Beckman Instruments, Scientific and Progress Instruments Division.
Chicago-viite (17. p.)Não informado. Analyzer. Fullerton, Calif: Beckman Instruments, Scientific and Progress Instruments Division, 1960.
MLA-viite (8. p.)Não informado. Analyzer. Beckman Instruments, Scientific and Progress Instruments Division, 1960.
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