&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cometary Astrometry : Proceedings of a Workshop Held June 18-19, 1984, at the European Southern Observatory Headquarters in Garching, Federal Republic of Germany / Ed. by Donald K. Yeomans. &mdash; NASA : JPL, California Institute of Technology, 1984. &mdash; 220 p. (JPL publication , ISSN 0892-9661 ; vol. 84 : p. 82)(NASA contractor report).<br><br><br>Yeomans, Donald K., ред.<br>European Southern Observatory<br>International Halley Watch<br><br>УДК: 523.6 <br><br>[ SYS NUM: 30052 ]