problème du repérage des aéronefs au son / R. Baillaud ; travaux exécutés sous la direction du général Ferrie Z.H.B. Marsch report / senate Select Committee of the Senate appointed to inquire into the late invasion and seizure of the public property at Harper's Ferry, beg leave to submit … Testimony taken before the Select Committee appointed by the United States Senate, to inquire into the facts and circumstances connected with the invasion and seizure … Convoluut bestaande uit 6 delen met als onderwerp Harper's Ferry en andere Amerikaanse zaken Encryptiemachine en vercijferapparaat Typex Mark II Flying wartime aircraft : ATA ferry pilots' handling notes for seven World War II aircraft / with an introduction and commentary by Hugh Bergel
