00292nam a2200121Ia 4500008004100000100002200041245002000063260004300083300000800126650001200134942000700146999001700153190216s9999||||xx |||||||||||||| ||und||  aPeter J. Collings 0aLiquid Crystals  bNew Age International Publishersc2007  a205  aPhysics  cBK  c34430d34430