Sacks, Gerald E.    <br/><br/>
Degrees of nusolvability.  
Gerald E. Sacks. 
 - 2 ed. 
 - Princeton,   Univ. Press.  1966 
 - ix,175p. 
<br/><br/>Includes index and Bibliography and Glossasry.  
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.  Mathematics. 
<br/><br/><label>Dewey Class. No.: </label>510/SAD