00334nam a2200121Ia 450000500170000000800410001704100080005808200150006610000210008124500490010226000520015130000090020320260720174531.0260720s2005    xx            000 0 und d  aeng  a372.8 SWAT  aSwami, Kavi Rama  aTechniues of teaching enviournmental science  aNew DelhibOrbis Books Sonali Publicationc2005  a292p