Dietzgen, Joseph  1828-1888 <br/><br/>
The positive outcome of philosophy :  the nature of human brain work, letters on logic, the positive outcome of philosophy / 
by Joseph Dietzgen ; translated by Ernest Unterman ; with an introduction by Anton Pannekoek ; edited by Eugene Dietzgen and Joseph Dietzgen jr. 
 - Chicago :  Charles H. Kerr & co,  1906. 
 - 444 p.  20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy<br/>Knowledge, Theory of<br/>Logic