TY  - BOOK
AU  - Zartman,Robert E.
AU  - Abston,C.C.
AU  - Bush,Charles A.
ED  - Geological Survey (U.S.)  
TI  - National geochronological and natural radioelement data bases
T2  - U.S. Geological Survey digital data series
PY  - 1995///
CY  - [Reston, Va.?], [Denver, Colo.
PB  - The Survey, For sale by USGS Distribution Branch]
KW  - Geological time
KW  - Databases
KW  - Local
KW  - CD-ROM Fed. Doc
KW  - Radioactive substances
N1  - Title from container insert; Shipping list no.: 95-006-E; Disk Characteristics: CD-ROM; A. National geochronological data base / by Robert E. Zartman, Charles A. Bush, and Carl Abston -- B. Natural radioelement data base / by Charles A. Bush and Carl Abston
N2  - The NGDB contains more than 30,000 individual published ages of rocks and minerals in the United States; while the NRDB contains analyses of the natural radioelements from more than 8500 whole rocks
ER  -