TY  - RPRT
TI  - Comment on "Sigma: Issues, insights, and challenges" by F. O. Strasser, N. A. Abrahamson J. J. Bommer
AU  - Z. Wang
PY  - 2009
DO  - 10.1785/gssrl.80.3.491
UR  - https://pubs.usgs.gov/publication/70034474
ID  - 70034474
ER  -