Editorial

1988

Editor, Proceedings of the 3rd Annual Conference on
Nonlinear Astronomy, Integrability in Dynamical Systems,
Annals of the New York Academy of Sciences 536, with
J. R. Buchler and J. Ipser.

1981--1987

Editor, Celestial Mechanics, for
Kluwer Academic Publishers; Dordrecht, The Netherlands

1969--1971

Reviewer, Applied Mechanics Reviews

1963

Editor, Space Mathematics, American Mathematical Society