000			00349nam a2200133Ia 4500
001			23502
008			170722s9999 xx 000 0 und d
020			_a8176480193
100			_aNayar, K. R.
245			_aEcology and health : _b a systems approach. /
260			_aNew Delhi : _bA P H Publishin , _c1998.
300			_a210 p. _c22cms
942			_cGEN
999			_c119114 _d119114