Text ( visual ) : unmediated Gravitation / A.R. Prasanna. -- : hbk. -- Boca Raton : CRC Press , c2017. -- xxv, 397 p. : ill. (some col.) ; 24 cm. -- Includes bibliographical references and index. -- ISBN 9781498746649 ; (BB25686274) ; https://ci.nii.ac.jp/ncid/BB25686274 Author Heading(s): Prasanna, A. R.. -- Classification(s): DC23 : 521.1. -- Subject Heading(s): LCSH : Gravitation