The Comet Halley handbook : an observer's guide /

by Yeomans, Donald K.
Pasadena, Calif. : Washington, D.C. : National Aeronatics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology ; For sale by the Supt. of Docs., U.S. G.P.O., 1983
2d ed., rev. 1 6/83.