TY  - BOOK
TI  - Exposure of the population in the United States and Canada from natural background radiation
T2  - Report, no.<94>
SN  - 0913392936
SN  - 0083209X
PY  - 1987///
CY  - Bethesda, Md.
PB  - NCRP
KW  - RADIACIONES -EXPOSICION
KW  - RADIACTIVIDAD NATURAL
N1  - Recommendations of the NCRP; Apéndices y bibliografía: p.150-189
ER  -