Letter from Thomas Gold to Dr L K Levsky, University Embankment 7/9, Leningrad State University, Institute of Earth Crust, Leningrad, 199164, USSR States this is the evidence from radar against bedrock at a shallow depth, and hence against the common view of regolith made from bedrock by impacts. Gold would be glad to hear of any new researches on noble gases, etc. He expects to be in Moscow June 4 to 18, and asks if he would have a chance to see Levsky. 21 March 1977