TY  - RPRT
TI  - Spatial variation and evolution of heliospheric sector structure
AU  - Behannon, K. W.
AU  - Burlaga, L. F.
AU  - Hoeksema, J. T.
AU  - Klein, L. W.
PY  - 1989
UR  - https://ntrs.nasa.gov/citations/19890041543
ID  - 19890041543
ER  -