1951 January 12 meeting of the Royal Astronomical Society

1951 July 25 meeting of the Royal Astronomical Society

1951 Lectures on Advanced Quantum Mechanics Second Edition

1951 Lick CCD Spectrum

1951 March 9 meeting of the Royal Astronomical Society

1951 May 11 meeting of the Royal Astronomical Society

1951 November 9 meeting of the Royal Astronomical Society

1951 October 12 meeting of the Royal Astronomical Society

1951 Summer meeting of the Royal Astronomical Society

1952 April 9 meeting of the Royal Astronomical Society

1952 December 12 meeting of the Royal Astronomical Society

1952 February 8 meeting of the Royal Astronomical Society

1952 January 11 meeting of the Royal Astronomical Society

1952 July 25 meeting of the Royal Astronomical Society

1952 March 14 meeting of the Royal Astronomical Society

1952 May 9 meeting of the Royal Astronomical Society

1952 November 14 meeting of the Royal Astronomical Society

1952 October 10 meeting of the Royal Astronomical Society

1952 Summer meeting of the Royal Astronomical Society

1953 April 10 meeting of the Royal Astronomical Society