British Standards Institution. (1967). Guide to the selection of electrical equipment for use in Division 2 areas. British Standards Institution.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBritish Standards Institution. Guide to the Selection of Electrical Equipment for Use in Division 2 Areas. London: British Standards Institution, 1967.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBritish Standards Institution. Guide to the Selection of Electrical Equipment for Use in Division 2 Areas. British Standards Institution, 1967.
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