Não informado. (1968). Electronic applications, components and materials. Philips Gloeilampenfabrieken.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Electronic Applications, Components and Materials. Eindhoven, Holanda: Philips Gloeilampenfabrieken, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Electronic Applications, Components and Materials. Philips Gloeilampenfabrieken, 1968.
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