Astrometric observations of comets and asteroids and subsequent orbital investigations
Subtitle: semiannual progress report no. 30 for the period 1 May through 31 October 1988
By: principal investigators, Richard E. McCrosky, Brian G. Marsden. .
Contributors: Marsden, Brian G.; United States. National Aeronautics and Space Administration.
Series: NASA contractor report -- NASA CR-183000.
Publisher: National Aeronautics and Space Administration; National Technical Information Service, distributor
Published: 1988
Place of publication: [Washington, D.C; Springfield, Va
Language: eng
Format: Microform
Subjects: Astrometry.; Astronomy-.; Comets.; Planets.
Notes: Distributed to depository libraries in microfiche.

Microfiche. [Washington, D.C. : National Aeronautics and Space Administration, 1989] 1 microfiche.