00351nam a2200121Ia 450000500170000000800410001704100080005808200150006610000210008124500800010226000380018230000090022020260720174537.0260720s2004    xx            000 0 und d  aeng  a372.8 SHRH  aShrivastava, A K  aHand Book for Teachers : Research in Technology of scology and enviournment  aNew DelhibA P H Publishingc2004  a400p