00278nam a2200109Ia 4500008004100000020001800041082001500059100001500074245002600089260004500115300000800160190710s9999    xx            000 0 und d  a81-7488-116-6  a574.5 D 64  aDiwan, A P 0aEcology and education  aNew DelhibAnmol Publications Pvt.c1995  a468