000			00297nam a2200133Ia 4500
008			160122s9999 xx 000 0 und d
041			_aEnglish
100			_aSaxena
245			_aDesert Environment
250			_a1st
260			_bmeerut:Pragati Parkas _c1991
300			_a160p.
650			_aPhysics
999			_c204 _d204