TY  - RPRT
TI  - An index of continuous-tone photographic prints of the digital shaded-relief map of the United States; whole or in six sections
AU  - Richard J. Pike
AU  - Gail P. Thelin
AU  - Chip P. Stevens
PY  - 1992
DO  - 10.3133/ofr92256
UR  - https://pubs.usgs.gov/publication/ofr92256
ID  - ofr92256
ER  -