Worrall, Jean. <br/><br/>
Introduction to valence theory/ 
Jean Worrall and I. J. Worrall. 
 - London:  Macdonald Technical,  1969. 
 - vii, 102 p.   illus.   22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Valence Theoretical chemistry
<br/><br/><label>LC Class. No.: </label>QD469