Text ( visual ) : unmediated Earth, moon and planets / by Fred L. Whipple. -- New York, N.Y. : Grosset & Dunlap , c1958. -- 293 p., [2] leaves of plates : ill. ; 21 cm. -- (The Harvard books on astronomy). -- (BA39262836) ; https://ci.nii.ac.jp/ncid/BA39262836 Author Heading(s): Whipple, Fred L.