Artifact Details Title Turing's treatise on the enigma Catalog Number 102660813 Type Document Description A Photographic Copy of a Paper Prepared in GCCS, Written ca. 1939-1942. Declassified 1996 2 copies Date 1939-1942 ca. Author Turing, Alan Category Technical Paper or Note Credit Gift of Douglas A Gwyn Lot Number X9250.2020
