The International Workshop on Radio Emissions from Planetary Magnetospheres at Graz by now has become somewhat of a tradition. The present, third workshop was held at a time when, with the Voyager 2 flyby of Neptune the number of radio planets in our solar system has finally risen to five. This workshop, as the past ones, has provided the international community working in this discipline an opportunity to present and discuss the observational and theoretical aspects of nonthermal planetary radio emissions and their contribution as a diagnostic tool for planetary magnetospheres in general. The present volume contains edited versions of the papers presented at the workshop; its publication was again made possible through the generous support of the Austrian Academy of Sciences. The organizers and editors also wish to express their gratitude for financial support to the Austrian Space Agency (ASA), NASA, the City of Graz and the Provincial Government of Styria and especially want to thank the University of Graz for again hosting this workshop. We hope to contribute the now established tradition of the Graz workshop on planetary radio emissions at some appropriate time in the future.