Correspondence from a folder labelled 'Conferences'. Material includes correspondence with ZK regarding invitations to speak at various international conferences, including:
- First International Symposium on Solar Radiation Simulation, January 1965, California, USA
- Colloque sur Les Antennes en Milieu Ionise, 21-25 June 1965, Centre National d'Études Spatiales (CNES), Paris, France.
- State of Oregon Lunar Geological Field Conference, 22-28 August 1965, Portland, Oregon, USA
- Bamberg Colloquium of the IAU (International Astronomical Union), 11-14 August, [Germany]
- California Institute of Technology and Boeing Jet Propulsion Laboratory, CALTECH-JPL Lunar and Planetary Conference, 13-18 September 1965, CALTECH, Pasadena, California, USA
Also, conference agendas and programmes; intermediary report on the colloquium; a printed discussion about a ZK paper; lists of speakers; and a geologic map of areas of Oregon (1957).