00322nam a2200109Ia 4500008004100000020001800041082001500059100002400074245006700098260003300165300001400198190710s9999    xx            000 0 und d  a0-306-40433-8  a301.31 B17  aBakshi, Trilochan S 0aEnvironmental education : principles, methods and applications  aNew YorkbPlenum Pressc1980  axiii, 285