00303nam a2200109 a 450000500170000002000280001708200190004510000220006424500500008626000380013630000190017420251203091519.0  a98102011097, 9810204035  a548.9,bD, Liq  aBahadur, Birendra  aLiquid Crystals:applications and uses Vol 1-3  aSingaporebWorld Scientificc1990  axxi,579p, 22cm