Гравитационно ускорение (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Гравитационно ускорение" in Bulgarian language version.

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1books.google.com

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books.google.com

Gerald James Holton and Stephen G. Brush. Physics, the human adventure: from Copernicus to Einstein and beyond. 3rd. Rutgers University Press, 2001. ISBN 978-0-8135-2908-0. с. 113.

doi.org

dx.doi.org

Hirt, C. и др. New ultrahigh-resolution picture of Earth's gravity field // Geophysical Research Letters 40 (16). 2013. DOI:10.1002/grl.50838. с. 4279 – 4283.