Richter, Nikolaus B <br/><br/>
Nature of comets 

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 - London  Methiuen  1965 
 - xii,221p.   
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<br/><br/><label>Subjects--Index Terms: </label>Astronomical physics  Physics, Astronomical  Astrophysics  Spectroscopy  black holes  Spectrum analysis  Astronomy  Physics  Stars  Comets  Astronomy 
<br/><br/><label>Dewey Class. No.: </label>523.6