Phillips, Jeffrey D. <br/><br/>
National geophysical data grids  gamma-ray, gravity, magnetic, and topographic data for the conterminous United States  [computer file] 
by Jeffrey D. Phillips, Joseph S. Duval, and Russell A. Ambroziak. 
, Computer data and programs. 
 - [Reston, VA]  Denver, CO  U.S. Dept. of the Interior, U.S. Geological Survey  For sale by USGS Map Distribution  1993. 
 - 1 computer laser optical disc  col.  4 3/4 in.  1 manual. 
 - U.S. Geological Survey digital data series  DDS-9 .
<br/><br/> Title from title screen.  Not copy-protected.  Disk Characteristics: CD-ROM 
<br/><br/> A package including gridded gamma-ray, gravity, magnetic, and topographic data for the conterminous United States with display software that allows the user to view data in image format and to overlay geology and state and county boundaries and U.S. Geological Survey software for analyzing and processing potential-field geophysical data. 
<br/><br/> Geologists, scientists, public health officials, and teachers. 
<br/><br/><br/>System requirements: IBM or compatible PC; 640K RAM; MS-DOS or PC-DOS 5.0 or later; Microsoft MSCDEX 2.1 or later; CD-ROM drive with ISO 9660 software driver; hard disk drive; SuperVGA graphics; math coprocessor. 
<br/><br/><label>LCCN: </label>93022546 //r94 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geophysics--Databases.--United States<br/>CD-ROM Fed. Doc.<br/>Geophysics--Software.--United States
<br/><br/><label>LC Class. No.: </label>QC808.6 
<br/><br/><label>Dewey Class. No.: </label>557.3 
<br/><br/><label>GPO Item No.: </label>0621-K 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.121:9