00318nam a2200121Ia 450000500170000000800410001704100080005808200170006610000200008324500670010326000180017030000080018820260720174720.0260720s2000    xx            000 0 und d  aeng  a372.357 KUMO  aKumari Shashi M  aOur life our world:environment studies : social studies book 1  aChennaic2000  a72p