TY  - RPRT
TI  - National geochronological and natural radioelement data bases
AU  - Robert E. Zartman
AU  - Charles A. Bush
AU  - C. C. Abston
PY  - 1995
DO  - 10.3133/ds14
UR  - https://pubs.usgs.gov/publication/ds14
ID  - ds14
ER  -