The study of the physics of cometary nuclei
Subtitle: semiannual progress reports nos. 22-23-24 for the period 1 April 1985 through 30 September 1986
By: principal investigator, Fred L. Whipple.
Contributors: Smithsonian Astrophysical Observatory.; United States. National Aeronautics and Space Administration.
Series: NASA contractor report -- NASA CR-180153.
Publisher: Smithsonian Institution, Astrophysical Laboratory; National Aeronautics and Space Administration; National Technical Information Service, distributor
Published: 1987
Place of publication: Cambridge, Mass; [Washington, D.C; Springfield, Va
Language: eng
Format: Microform
Subjects: Asteroids.; Comet nuclei.; Halley's comet.; Orbital mechanics.
Notes: Distributed to depository libraries in microfiche.

Microfiche. [Washington, D.C. : National Aeronautics and Space Administration, 1987] 1 microfiche.