1968 March 8 (meeting)
1968 May 10 (meeting)
1968 November 8 (meeting)
1968 October 11 (meeting)
1969 - 2010: Multicolor Photometric Observations of Population II Field Horizontal-Branch Stars
1969 April 11 (meeting)
1969 December 12 (meeting)
1969 January 10 (meeting)
1969 M. D. F. Curve of sunspots.
1969 March 14 (meeting)
1969 May 9 (meeting)
1969 November 14 (meeting)
1969 October 1 (meeting)
1969 October 10 (meeting)
1969 Smithsonian Standard Earth (ii)
1969 Summer Meeting
1969 to 2010: Multicolor Photometric Observations of Population II Field Horizontal-Branch Stars
196th Meeting of the American Astronomical Society
1970 December 11 (meeting)
1970 January 9 (meeting)