TY  - RPRT
TI  - Vector magnetic field changes associated with X-class flares
AU  - Wang, Haimin
AU  - Ewell, M. W., Jr.
AU  - Zirin, H.
AU  - Ai, Guoxiang
PY  - 1994
UR  - https://ntrs.nasa.gov/citations/19950034551
ID  - 19950034551
ER  -