TY  - RPRT
TI  - Algebraic and graphic methods for evaluating discordant lead-isotope ages
AU  - Lorin Rollins Stieff
AU  - T. W. Stern
AU  - Ralph Newton Eicher
PY  - 1963
DO  - 10.3133/pp414e
UR  - https://pubs.usgs.gov/publication/pp414E
ID  - pp414E
ER  -