TLS signed “David R. Scott,” one page, 8 x 10.5, NASA letterhead, stamp dated April 6, 1973. Letter to a collector. In part; “I am sorry that I am so long in replying, but I think I now have the information you wanted…Also enclosed is a brochure on the Apollo Soyuz Test Project which may interest you.” In fine condition, with punch holes to left edge. Pre-certified Scott Cornish and RR Auction COA.