TY  - RPRT
TI  - A bibliography of terrain modeling (geomorphometry), the quantitative representation of topography: Supplement 4.0
AU  - Richard J. Pike
PY  - 2002
DO  - 10.3133/ofr02465
UR  - https://pubs.usgs.gov/publication/ofr02465
ID  - ofr02465
ER  -