Source book in astronomy 1900-1950 
edited by Harlow Shapley                                        
 - Cambridge  Harvard University Press  1960 
 - xv, 423p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Astronomy-History<br/>Astrophysics
<br/><br/><label>Universal Decimal Class. No.: </label>52(091)                   / SHA