“Star Clusters.” How Old Is the Universe?, by DAVID A. WEINTRAUB, Princeton University Press, PRINCETON; OXFORD, 2011, pp. 111–125, www.jstor.org/stable/j.ctt7sx5g.13. Accessed 9 Aug. 2020.
WEINTRAUB, D. (2011). Star Clusters. In How Old Is the Universe? (pp. 111-125). PRINCETON; OXFORD: Princeton University Press. Retrieved August 9, 2020, from www.jstor.org/stable/j.ctt7sx5g.13
WEINTRAUB, DAVID A. "Star Clusters." In How Old Is the Universe?, 111-25. PRINCETON; OXFORD: Princeton University Press, 2011. Accessed August 9, 2020. www.jstor.org/stable/j.ctt7sx5g.13.
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