TY - RPRT TI - Digital image processing techniques for detecting surface alteration - An application on the Alaska Peninsula: A section in The United States Geological Survey in Alaska: Accomplishments during 1983 AU - James York AU - Frederic H. Wilson AU - Bruce M. Gamble PY - 1985 DO - 10.3133/70180229 UR - https://pubs.usgs.gov/publication/70180229 ID - 70180229 ER -