Tomescu, Ioan <br/><br/>
Problems in combinatorics and graph theory  / 

 - New York:  John Wiley,  1985 
 - xvii, 335p. Bibl. 
 - Wiley-interscience series in discrete Mathematics .
<br/><br/> "Translated from the Romanian by Robert A. Malter". 
<br/><br/><label>Dewey Class. No.: </label>511.6  / T656.PC