Anderson, John Mueller, <br/><br/>
Natural deduction 
the logical basis of axiom systems by John M. Anderson and Henry W. Johnstone, Jr. 
 - Belmont, Ca.  Wadsworth Publishing Co.  1962. 
 - 418 pages ;  illustrations :  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical.<br/>Metamathematics.