The Use of the Observations of Halley's Comet during its 1986 Appearance for Accomplishing Space Projects Kolyuka, Y. F. ; Kudryavtsev, S. M. ; Tarasov, V. P. ; Tikhonov, V. F. Abstract Publication: Soviet Astronomy Letters Pub Date: July 1987 Bibcode: 1987SvAL...13..263K