Comets in the post-Halley era. Volume 1, In part based on reviews presented at the 121st Colloquium of the International Astronomical Union, held in Bamberg, Germany, April 24-28, 1989 / scientific editors, R.L. Newburn, Jr., M. Neugebauer and J. Rahe ; production editor, L. Fry   .  Dordrecht ; London :  Kluwer Academic,  c1991 . 688 s.