Science Service. Science news yearbook, 1970. Charles Scribner's Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रScience Service. Science News Yearbook, 1970. New York: Charles Scribner's Sons.
एमएलए (9वां संस्करण) प्रशस्ति पत्रScience Service. Science News Yearbook, 1970. Charles Scribner's Sons.
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