TY  - RPRT
TI  - Circumstances for Pluto-Charon mutual events in 1987
AU  - Tholen, David J.
AU  - Buie, Marc W.
AU  - Swift, Catherine E.
PY  - 1987
UR  - https://ntrs.nasa.gov/citations/19870040774
ID  - 19870040774
ER  -