MacBean, J. C. (1973). Astronomy: Examining your environment. Holt, Rinehart and Winston of Canada.
Chicago-viite (17. p.)MacBean, John C. Astronomy: Examining Your Environment. Toronto: Holt, Rinehart and Winston of Canada, 1973.
MLA-viite (8. p.)MacBean, John C. Astronomy: Examining Your Environment. Holt, Rinehart and Winston of Canada, 1973.
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