Wallis <br/><br/>
Combinatrics: Room squares, sumfree sets, hadamard matrices 
Wallis; Wallis 
 - Berlin  Springer-Verlaf           1972 
 - 508p.  cm. 
 - Lecture notes in mathematics; 292 .
<br/><br/><label>Standard No.: </label>40540 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial Theory
<br/><br/><label>Dewey Class. No.: </label>B217, L2