TY  - BOOK
TI  - Environmental radiation measurements
T2  - Report, no.<50>
SN  - 0913392324
SN  - 0083209X
PY  - 1976///
CY  - Washington
PB  - NCRP
KW  - RADIACIONES -MEDICION Y CONTROL
N1  - Recommendations of the NCRP; BibliografÃ­a: p.199-234
ER  -