Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Meeting on The Gravitational Force Perpendicular to the Galactic Plane and Philip, A. G. Davis and Lu, Phillip K.","The Gravitational force perpendicular to the galactic plane : a meeting held at the Center for Galactic Astronomy, Western Connecticut State University in Danbury, Connecticut, May 19 - 20, 1989",,L. Davis Press,1989,Van Vleck Observatory contribution,,0933485115,,https://cir.nii.ac.jp/crid/1130000797429164032