00318nam a2200121 a 450000500170000002000150001708200170003210000300004924500340007926000400011330000240015349000190017720251203090700.0  a0852268890  a577.277bNAT  aVohra,K.G. [et...al] ed.,  aNatural radiation environment  aDelhibWjiley Eastern Limitedc1982  axi,691p.c22cm.bHB  aincludes index