Great Britain. Schools Council Project Technology. (1973). Photocell applications. Hodder and Stoughton.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGreat Britain. Schools Council Project Technology. Photocell Applications. London: Hodder and Stoughton, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGreat Britain. Schools Council Project Technology. Photocell Applications. Hodder and Stoughton, 1973.
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