Michael Detlefsen <br/><br/>
Proof, Logic and Formalization 

 -  Routledge  1992 
<br/><br/><label>ISBN: </label>9780415023351 
<br/><br/><label>Subjects--Topical Terms: </label><br/> General<br/>Logic, Symbolic and mathematical.,Mathematics--Philosophy.,Proof theory.<br/>PHILOSOPHY