TY  - RPRT
TI  - Anthropogenic and natural variation in ridge and slough pollen assemblages
AU  - C.E. Bernhardt
AU  - Debra A. Willard
AU  - M. Marot
AU  - C. W. Holmes
PY  - 2004
DO  - 10.3133/ofr20041448
UR  - https://pubs.usgs.gov/publication/ofr20041448
ID  - ofr20041448
ER  -