Paul Whitaker, Louis Kruh. From Bletchley Park to Berchtesgaden. Cryptologia, 11(3):129-141, 1987. [doi]
@article{WhitakerK87,
title = {From Bletchley Park to Berchtesgaden},
author = {Paul Whitaker and Louis Kruh},
year = {1987},
doi = {10.1080/0161-118791861938},
url = {http://dx.doi.org/10.1080/0161-118791861938},
researchr = {https://researchr.org/publication/WhitakerK87},
cites = {0},
citedby = {0},
journal = {Cryptologia},
volume = {11},
number = {3},
pages = {129-141},
}