Dynamical and photometric investigation of cometary type II tails
Subtitle: semiannual progress report
By: principal investigator, Zdenek Sekanina
Contributors: United States. National Aeronautics and Space Administration
Publisher: Smithsonian Institution Astrophysical Observatory
Published: 1972
Place of publication: Cambridge, Mass
Language: eng
Subjects: Comets; Orbits; Observations
Other titles: Cometary type II tails : semiannual progress report /
Notes: "Prepared for National Aeronautices and Space Administration, Washington, D. C. 20546."

"Grant NGR 09-015-159."

Includes bibliographical references.
Table of contents: title: No. 2. For the period March 15 to September 14, 1972; title: no. 6. For the period March 15 to September 14, 1974; title: no. 7. For the period September 15, 1974 to March 14, 1975; title: no. 8. For the period March 15 to September 14, 1975; title: no. 9. For the period September 15, 1975 to March 14, 1976.