| letter-coded file (A registry file in KGB intelligence agencies containing materials relating to counter-intelligence work, or to diplomatic, trade and other missions and Soviet establishments abroad, or scientific and other delegations traveling abroad from https://books.google.com/books?id=cKErBgAAQBAJ&pg=PA426&lpg=PA426&dq=liternoye+delo&source=bl&ots=Wgk0Bm27f2&sig=ACfU3U0x69wPbWJDUg3YVZZDdfhxPkO1nw&hl=en&sa=X&ved=2ahUKEwi398PLqbnjAhWYHc0KHdpRBpIQ6AEwAXoECAkQAQ#v=onepage&q=liternoye%20delo&f=false | литерное дело (Tanya Gesse) |
