00293nam a2200121 a 450000500170000008200170001710000060003411000150004024500470005526000310010230000220013371000160015520251203091558.0  a621.366bCHO  d_  aChopra, S.  aLasers in chemical and biological sciences  aDelhibWiley Easternc1992  axvi, 190p, 22 cm.  aChawla, HM.