000			00271nam a22000977a 4500
999			_c331495 _d331495
020			_a0852268890
082			_a616.9897 _bNAT
245			_a Natural radiation environment _c edited by K.G. Vohra... [et al.
260			_aNew Delhi: _bWiley eastern limited, _c1982
942			_cBK