Ullmann's Encyclopedia of Industrial Chemistry  Index to V.A1 to V.A28, V.B1 to V.B8 
ed. by Hertha Buchholz,[et al] 
 - 5th. 
 - Weinheim  VCH  1996 
 - xvi, 702p. 
<br/><br/><label>ISBN: </label>3527201505 
<br/><br/><label>Dewey Class. No.: </label>660.0321  / N85.I6 "R"