00413nam a2200157Ia 4500008004100000020001500041082001900056100001700075245002300092260005800115300000800173650001400181650002000195653001400215653002600229170901s1999    xx            000 0 und d  a8187336404  a375.0083bP14P  aPandey, B.B. 0aParyavaran Shiksha  aNew DelhibDominant Publishers and Distributorsc1999  a362  aEducation  aSocial sciences  aCurricula  aEnvironmental studies