Photochromism  molecules and systems 
edited by Heinz Durr and Henri Bouas-Laurent. 
 - Amsterdam :   Elsevier North-Holland,   1990. 
 - 1068 pages:   illustrations ;    25cm. 
<br/><br/><label>ISBN: </label>0444874321 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photochromism