Colloquium held in Ramsau, Germany in 1996.
Partly reprinted from: Celestial mechanics and dynamical astronomy, vol. 65, no.1-2, 1996/7.
The dynamical behaviour of our planetary system : proceedings of the Fourth Alexander von Humboldt Colloquium on Celestial Mechanics. ISBN 0792345487. Published by Kluwer Academic in 1997. Publication and catalogue information, links to buy online and reader comments.