Brown, S. B. (1971). Realm of science: Atoms, stars and nebulae V. 11. Touch Stone Publishing.
शिकागो स्टाइल उद्धरणBrown, S B. Realm of Science: Atoms, Stars and Nebulae V. 11. USA: Touch Stone Publishing, 1971.
एमएलए उद्धरणBrown, S B. Realm of Science: Atoms, Stars and Nebulae V. 11. Touch Stone Publishing, 1971.
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