Reston, VA | [Denver, Colo. U.S. Dept. of the Interior, U.S. Geological Survey | Branch of Distribution] 1991 .
computer laser optical disks , Title from disk label. | Title on container and with text: 1:100,000-scale digital line graph (DLG) data, hydrography and transportation. | "US GeoData"--Disk label. | Disks for areas prepared prior to April 1993 issued by Earth Science Information Office. | "National Mapping Division" on disks prepared from April 1993 forward. | Shipping list no.: 91-0060-E (area 4); 93-0018-E (area 2,14); 93-0030-E (areas 3,13). | "March 1991"--Area 4 disk label; "January 1993"--Area 3 disk label; "February 1993"--Area 13 disk label; "March 1993"--Area 2 disk label; "April 1993"--Area 14 disk label. | Disk characteristics: CD ROM. | ISO 9660 format. | Cartographic information complete on 14 computer disks. 4 3/4 in..

Reston, VA The Center 1995 .
1 computer laser optical disk , Title from disk label. | "US GeoData"--Disk label. | Digital line graph data covers 21 areas in the United States, Alaska, and the Aleutian and Hawaiian Islands. | Disk Characteristics: CD-ROM 4 3/4 in..