Correspondence and papers from a folder labelled 'Physics and Astronomy of the Moon'. Material relates to a title by ZK, published by Academic Press, New York, USA, in 1962, with a second edition in 1971.
Physics and Astronomy of the Moon was a study of he motion of the moon in space and libration of the Moon.
Material for the two editions of the book includes: ZK's correspondence with contributors and potential contributors; notes on making subject indices; lists of contributors; subject indices; lists of invited contributors; preface; a chapter 'Geometrical and Dynamical Properties of the Moon' by C. L. Goudas, Department of Mechanics, University of Patras, Greece; list of chapters; part of a paper [by G. W. Groves]; correspondence regarding recruiting Associate Editors for Physics and Astronomy. A new international journal of astrophysical sciences, co-edited by Kopal and L. H. Aller.