TY  - RPRT
TI  - Change of the isotopic abundance ratio within a sphere due to diffusion
AU  - J.T. Bracken
AU  - F. E. Senftle
PY  - 1954
DO  - 10.1063/1.1721618
UR  - https://pubs.usgs.gov/publication/70221435
ID  - 70221435
ER  -