DeMeyer F. <br/><br/>
Quadratic Forms Over Q and Galois Extensions of Commutative Rings. 
DeMeyer F., Harrison D., Miranda R. 
 - Providence  Amer. Math. Soc.  1989 
 - 70 p. 
<br/><br/> Memoirs of the American Mathematical Society,   Vol. 77, N 394 
<br/><br/><label>Dewey Class. No.: </label>MAMS