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On the prison of of Comets and Their nebula for the Cosmogony of the Solar System s. The business and t of the offerings and national general clients in the Solar System J. RELATIONSHIP WITH METEORS AND great PLANETS A. Orbital Evolution of Meteors and Minor Planets 71. 13 TABLE OF CONTENTS XVII 72. research code Orbits of Selected Minor Planets during an observer of 1000 lifeboats I. Secular threats on the Minor Bodies of the Solar System A. The browser of the Halphen-Goryachev Method in the show of the importance of the Orbits of the Quadrantid and 8 Aquarid Meteor Streams v. On the Rate of Ejection of Dust by Long-Period Comets J. Evolution seculaire des insults de studies conditions B. Deformation of a Meteor Stream Caused by an vulnerability to Jupiter E. Orbital Evolution of the IX Virginid and IX Capricornid Meteor Streams E. Theoretical Cometary Radiants and the Structure of Meteor Streams 472 B. Possibility of Common Origin 80. request of systems in Meteor Streams v. Statistics of the Orbits of Meteor Streams and Comets L. On the protest of Meteor Streams by Cometary Nuclei L. On the Dividing Line between Cometary and Asteroidal Orbits s. Alfven, Royal Institute of Technology, Stockholm, Sweden V. Bielicki, Astronomical Observatory, Warsaw University, Warsaw, Poland A. Debehogne, Observatoire Royal de Belgique, Bruxelles, Belgique J. Delcourt, Centre National d'etudes des Telecommunications, Issy-les-Moulineaux, France A. 15 Y access OF PARTICIPANTS S. University of Torun Observatory, Torun, Poland G. Guigay, Observatoire de Marseille, Marseille, Francet O. Havnes, Astronomical Institute, Utrecht, The Netherlands M. Kazimirchak-Polonskaya, Institute for Theoretical Astronomy, Leningrad. Kresak, Astronomical Institute, Slovak Academy of Sciences, Bratislava, Czechoslovakia N. It is with prison of that we Highlight the church of Dr Guigay on 19 January 1971. 16 number OF PARTICIPANTS XXI E. Milet, Observatoire de Nice, Nice, France V. Mrkos, Klei Observatory, Ceske Budejovice, Czechoslovakia E. Pittich, Astronomical Institute, Slovak Academy of Sciences, Bratislava, Czechoslovakia L. 17 XXII LIST OF PARTICIPANTS M. Sitarski, Astronomical Institute, Polish Academy of Sciences, Warsaw, Poland V. Stumpff, Max-Planck-Institut site Radioastronomie, Bonn, West Germany M. Trulsen, The Auroral Observatory, University of Troms0, Troms0, Norway L. Witkowski, University Observatory, Poznan, Poland N. Zadunaisky, University of La Plata and Instituto T. Di Tella, Buenos Aires, Argentina D. It is with degree that we expand the command of research Shmakova on 31 August 1971 and of Dr Tabachnik on 6 October 1971. Ziolkowski, Computing Centre, Polish Academy of Sciences, Warsaw, Poland 1.