Covalent compounds / 
Science foundation course team, M. J. Pentz. 
 - Bletchley :  The Open University Press ,  1971. 
 - 96 p. : 
<br/><br/><label>ISBN: </label>2022 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical bonds.
<br/><br/><label>Dewey Class. No.: </label>541.224  / Co