00401nam a2200157Ia 4500008004100000020001500041082001600056100001700072245002300089260004800112300000800160650001800168650001800186653001600204653002300220170901s1995    xx            000 0 und d  a8171360491  a574.5bS92P  aSugandhi, R. 0aParyawaran-Shiksha  aDelhibPeriodical Experts Book Agencyc1995  a102  aLife sciences  aPure Sciences  aEnvironment  aStudy and teaching