Shapley, Harlow,  1885-1972, <br/><br/>
Source book in astronomy, 1900-1950. 

 - Cambridge,  Harvard University Press,  1960. 
 - xv, 423 p.  illus., diagrs., tables.  24 cm. 
 - Source books in the history of the sciences .
<br/><br/> "Identification and sources": p. [411]-417. 
<br/><br/><label>LCCN: </label>60013294 //r962 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.
<br/><br/><label>LC Class. No.: </label>QB3  / .S52 
<br/><br/><label>Dewey Class. No.: </label>520.82