International Halley watch amateur observers' manual for scientific comet studies
Edberg, Stephen J.
Hillside, NJ Enslow Publishers Cambridge, Mass. Sky Pub. Corp.
1983
Title on spine: International Halley watch observers' manual
: Originally published by the National Aeronautics and Space Administration and by the Jet Propulsion Laboratory of the California Institute of Technology"--T.p. verso
Includes bibliographies
Comets
Halley's comet