Wolf A <br/><br/>
Essentials of scientific method 

 - 2nd 
 - London  George Allen & Unwin      1925 
<br/><br/><label>Standard No.: </label>69,881 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHILOSOPHY
<br/><br/><label>Dewey Class. No.: </label>R17, F5,F5;1 (=)