Hajnal, A & Sos, V.T (eds) <br/><br/>
Combinatorics. Vol.2  proceedings of the 5th hungarian Coll. held at keszthely, hungary, 28th June-3 July 1976 
Ed by A. Hajnal & V.T. Sos 
 - Amsterdam  North-Holland Pub. Co.  1978 
 - 609-1220 
 - Colloquia Mathematica Societatis Janos Bolyai 18 .
<br/><br/><label>ISBN: </label>0444850933 
<br/><br/><label>Dewey Class. No.: </label>2.08  / HAJN