TY  - RPRT
TI  - Physical observations of comets: Their composition, origin and evolution
AU  - Cochran, Anita L.
AU  - Barker, Edwin S.
AU  - Cochran, William D.
PY  - 1991
UR  - https://ntrs.nasa.gov/citations/19920003587
ID  - 19920003587
ER  -