1981 March 13 (meeting)
1981 March 13 meeting of the Royal Astronomical Society
1981 May 8 (meeting)
1981 May 8 meeting of the Royal Astronomical Society
1981 N 1
1981 November 13 (meeting)
1981 November 13 meeting of the Royal Astronomical Society
1981 October 9 (meeting)
1981 October 9 meeting of the Royal Astronomical Society
1981 Photometry of UX Arietis
1981 QA
1981 QA
1981 QA
1981 QA
1981 QA
1981 QB
1981 QB
1981 QB
1981 QB
1981 QB