Middlehurst, Barbara M. <br/><br/>
Stars and Stellar Systems   : Nebulae and interstellar matter 

 - Chicago:  University of Chicago Press  1968 
 - xxii, 835p. :   il; 25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrofísica y Astronomía Descriptiva