Russell, Bertrand. <br/><br/>
Our knowledge of the external world :  as a field for scientific method in philosophy / 
Bertrand Russell. 
 - London :  George Allen & Unwin,  1922. 
 - 251p. ;  22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Theory (Philosophy).<br/>Logic.<br/>Knowledge, Theory of.<br/>Philosophy.
<br/><br/><label>Dewey Class. No.: </label>100.72