TY  - RPRT
TI  - UISO; a program for calculation of 230Th-234U-238U isochron ages
AU  - K.R. Ludwig
PY  - 1993
DO  - 10.3133/ofr93531
UR  - https://pubs.usgs.gov/publication/ofr93531
ID  - ofr93531
ER  -