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 / Ed. by A. Dold, B. Eckmann  759 .
<br/><br/>Includes bibliogr. references and index. 
<br/><br/><label>ISBN: </label>0387097104 
<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