ہم مرکز اشیاء (Urdu Wikipedia)

Analysis of information sources in references of the Wikipedia article "ہم مرکز اشیاء" in Urdu language version.

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3books.google.com

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archive.org

Robert D. Gillard (1987)، Comprehensive Coordination Chemistry: Theory & background، Pergamon Press، ص 137, 139، ISBN:9780080262321.
Robert D. Gillard (1987)، Comprehensive Coordination Chemistry: Theory & background، Pergamon Press، ص 137, 139، ISBN:9780080262321.

books.google.com

Daniel C. Alexander؛ Geralyn M. Koeberlein (2009)، Elementary Geometry for College Students، Cengage Learning، ص 279، ISBN:9781111788599.
Godfrey Harold Hardy (1908)، A Course of Pure Mathematics، The University Press، ص 107.
Joseph Spurk؛ Nuri Aksel (2008)، Fluid Mechanics، Springer، ص 174، ISBN:9783540735366.