| 
		The Positive Outcome of Philosophy: The Nature of Human Brain Work. Letters On Logic. the Positive Outcome of Philosophy | 
		 JOSEPH DIETZGEN  | 
		 | 
		1906 | 
	
		
		 
		 | 
		The Positive Outcome of Philosophy | 
		 JOSEPH DIETZGEN  | 
		 | 
		 | 
	
		
		 
		 | 
		THE POSITIVE OUTCOME OF PHILOSOPHY:The Nature of Human Brain Work Letters on Logic. The Positive Outcome of Philosophy | 
		 JOSEPH DIETZGEN  | 
		 | 
		3.QO6 |