Friend, J.Newton . <br/><br/>
The Theory of Valency /  Textual Documents 
J.Newton Friend. 
 - 1st ed. / 
 - New York :  Longmans Green & Co ,  1909. 
 - 175p. ;  19cm. 
<br/><br/><label>Subjects--Index Terms: </label>Valency theory Valency theory G-Chemistry 
<br/><br/><label>Dewey Class. No.: </label>541.39  / F 915 T