Ball, R. S. (1869). Nebulae: a lecture delivered by Robert Stawell Ball: Royal Dublin Soc. Afternoon Scientific Lecutres, April 17, 1869.
MLA CitationBall, Robert S. Nebulae: A Lecture Delivered by Robert Stawell Ball: Royal Dublin Soc. Afternoon Scientific Lecutres, April 17, 1869. 1869.
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