Nebulae and interstellar matter. 
Edited by Barbara M. Middlehurst and Lawrence H. Aller. 
 - Chicago  University of Chicago Press,  1968. 
 - xxii, 835 p.  ill. ;  24 cm. 
 - Stars and stellar systems; compendium of astronomy and astrophysics  Vol. 7 .
 - Stars and stellar systems,  7 .
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrophysics<br/>Interstellar matter<br/>Nebulae.