Гравитационно поле (Bulgarian Wikipedia)

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

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books.google.com

Файман Р., Лекции по физика, София:Наука и изкуство, том 1; (англ.) Richard Feynman. The Feynman Lectures on Physics Vol I. Addison Wesley Longman, 1970. ISBN 978-0-201-02115-8.
Richard Feynman. The Feynman Lectures on Physics Vol II. Addison Wesley Longman, 1970. ISBN 978-0-201-02115-8. "A „field“ is any physical quantity which takes on different values at different points in space."