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