TY  - RPRT
TI  - Gas and dust in some recent periodic comets
AU  - Ahearn, M. F.
AU  - Millis, R. L.
AU  - Birch, P. V.
PY  - 1979
UR  - https://ntrs.nasa.gov/citations/19790049778
ID  - 19790049778
ER  -