TY  - RPRT
TI  - Evaluation of the United States Geological Survey's Three-Step assessment methodology
AU  - D.P. Harris
AU  - Michael Rieber
PY  - 1993
DO  - 10.3133/ofr93258a
UR  - https://pubs.usgs.gov/publication/ofr93258A
ID  - ofr93258A
ER  -