TY  - RPRT
TI  - Modeling boot-shaped coronal holes using SOHO-MDI magnetic measurements
AU  - Zhao, X. P.
AU  - Hoeksema, J. T.
AU  - Scherrer, P. H.
PY  - 1997
UR  - https://ntrs.nasa.gov/citations/19990028159
ID  - 19990028159
ER  -