The Second Forty Years (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "The Second Forty Years" in English language version.

refsWebsite
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6th place
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low place
8,442nd place

archive.org

  • Achenbaum, W. Andrew (1995). Crossing Frontiers: Gerontology Emerges as a Science. Cambridge University Press. pp. 90–91. ISBN 978-0521558808. Retrieved February 12, 2017.

books.google.com

kirkusreviews.com

quoteinvestigator.com

vox.com