TY  - RPRT
TI  - A direct-gradient multivariate index of biotic condition
AU  - Leandro E. Miranda
AU  - J.N. Aycock
AU  - K. J. Killgore
PY  - 2012
DO  - 10.1080/00028487.2012.717519
UR  - https://pubs.usgs.gov/publication/70150361
ID  - 70150361
ER  -