Internationales Kepler-Symposium:  Weil der Stadt, 1971. 

 - [1st ed.] 
 - Hildesheim:  Verlag Dr. H.A. Gerstenberg,  1973. 
 - 490 p. 
 - Arbor Scientiarum ACM monograph series .
<br/><br/><label>Dewey Class. No.: </label>510.9  / I61