P U B L I S H E R ' S N O T E

Conditions for reproducing material from Pergamon Press Publications

All editorial material appearing in Pergamon Press publications is covered by copyright, except where otherwise stated. We normally agree to the reproduction, free of charge, of all items which appear in Pergamon publications proyided prior permission has been sought. Moreover, we are prepared to produce any number of prints of contributions which we have published at a small charge to cover printing and/or reproduction costs.

This information is given in the light of the frequent enquiries received on this point from organizations and individuals.

ROBERT MAXWELL, Publisher at Pergamon Press.