Ray, P. <br/><br/>
(The) Theory of valency and the structure of chemical compounds / 
by P. Ray. 
 - Calcutta :  IACS,  1946 
 - [8], 81p. : ill. ;  24x17 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MOLECULAR BONDS AND VALENCY
<br/><br/><label>Dewey Class. No.: </label>541.224  / RAY-THE