TY  - RPRT
TI  - Holocene geomagnetic secular variation in the western United States: implications for the global geomagnetic field
AU  - Duane E. Champion
PY  - 1980
DO  - 10.3133/ofr80824
UR  - https://pubs.usgs.gov/publication/ofr80824
ID  - ofr80824
ER  -