Ackermann, W. <br/><br/>
Solvable cases of the decision problem. 

 - Amsterdam,  North-Holland Pub. Co.,  1954. 
 - 114 p. 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical.<br/>MCE
<br/><br/><label>Dewey Class. No.: </label>519.542  / ACK