Hynek, J Allen <br/><br/>
Astronomy one 
J. Allen Hynek and Necia H. Apfel 
 - California  W. A. Benjamin  1972 
 - 402p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Astronomy and astrophysics thesaurus<br/>Astrophysics
<br/><br/><label>Universal Decimal Class. No.: </label>52  / HYN