Conway, John Horton. <br/><br/>
Sensual (quadratic) form / 
John H. Conway ; assisted by Francis Y.C. Fung. 
 - [Washington, DC] :  Mathematical Association of America,  c1997. 
 - xiii, 152 p. :  ill. ; 
 - Carus mathematical monograph  No.26 .
<br/><br/><label>ISBN: </label>0883850303 
<br/><br/><label>Subjects--Index Terms: </label>Quadratic form 
<br/><br/><label>Universal Decimal Class. No.: </label>511.342.2  / CON