Tohutoro APA (7th ed.)
Das, A. (2011). Lectures on gravitation. World Scientific.
Tohutoru Kātū Chicago (17th ed.)
Das, Ashok. Lectures on Gravitation. Hackensack, N.J.: World Scientific, 2011.
Tohutoro MLA (9th ed.)
Das, Ashok. Lectures on Gravitation. World Scientific, 2011.
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