Roelfsema, P. R. <br/><br/>
Radio recombination line observations of HII regions and planetary nebulae 
P. R. Roelfsema                                               
 - Groningen  Groningen University  1958 
 - vii,185p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>H II Regions<br/>Ph.D.Thesis<br/>Planetary Nebulae<br/>Radio Recombination Lines
<br/><br/><label>Universal Decimal Class. No.: </label>047:524.523  / ROE