TY  - RPRT
TI  - Range indices of geomagnetic activity
AU  - W.F. Stuart
AU  - A.W. Green
PY  - 1988
DO  - 10.1016/0021-9169(88)90107-9
UR  - https://pubs.usgs.gov/publication/70013786
ID  - 70013786
ER  -