TY  - RPRT
TI  - Magnetospheric cutoff for 1.5-mev extra- terrestrial protons
AU  - Fan, C. Y.
AU  - Simpson, J. A.
AU  - Stone, E. C.
PY  - 1964
UR  - https://ntrs.nasa.gov/citations/19640017295
ID  - 19640017295
ER  -