ISBN 1540228509 books & textbook
Pluto and Lowell Observatory: A History of Discovery at Flagstaff
Schindler, Kevin Grundy, Will Stern, Annette and Alden Tombaugh and W
History Press Library Editions /2018-03-12 Hardcover / 194 Pages
isbn-10: 1540228509 / isbn-13: 9781540228505
