Research and System Requirements for a Lunar Scientific Laboratory.- Commentary on the Paper of C. W. Henderson and G. L. Mitcham.- Recherche géologique lunaire.- Sur un programme de sélénophysique pour un Laboratoire Lunaire International.- Lunar Meteorological Observatory for Observations of the Earth.- Lunar Astronomical Observatory.- Astronomical Telescope on the Moon.- Lunar Radio Astronomy Observatory.- Eclipse Observation from the Moon and Cislunar Space.- On Solar Observations at an International Observatory on the Moon.- Exploration of the Interplanetary Medium from Lunar and Cislunar Space.- Observations of Star Fields Made Beyond the Atmosphere.