Letter form Thomas Gold to Dr Daniel Hunt Jr, Head, Office of National Centers and Facilities Operations, National Science Foundation, 1800 G Street, NW, Washington DC Currently holding up arrangements with PKW until have heard from Hunt. Hunt;s time schedule for the preparation of an RFP is feasible and they will try to stick with it. Very happy to have the amendment that authorized Gold to appoint a project engineer.Discussea a propsal to establish a liaison group of NSF, NASA ARPA representative to coordinate the various research programs planned for Arecibo. Arecibo seems to have a very high reputation in the Soviet Union, and he has heard some rumours that they are building similar style spherical systems. 11 June 1970