Zwicky, Fritz <br/><br/>
Catalogue of galaxies and of clusters of galaxies  vol. 4, covering the palomar survey fields of the declination zones +60degrees, +66degrees, +72degrees, +78degrees, +84degrees, +90degrees 
Fritz Zwicky, E. Herzog and D. Wild 
 - California  California Institute of Technology  1968 
 - 294p. 
<br/><br/><label>Universal Decimal Class. No.: </label>083:523  / ZWI-3