Epstein, Richard L.,  1947- <br/><br/>
Degrees of unsolvability:  structure and theory/ 
Richard L. Epstein. 
 - Berlin ;  New York:  Springer-Verlag,  1979. 
 - xiv, 240 p.:  ill.;  24 cm. 
 - Lecture notes in mathematics ;  759. .
 - Lecture notes in mathematics (Springer-Verlag);  759. .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0387097104 
<br/><br/><label>LCCN: </label>79023748 //r85 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Unsolvability (Mathematical logic)<br/>Lattices, Distributive.
<br/><br/><label>Dewey Class. No.: </label>510/.8 s  511/.3