This 1992 article from Studies in Intelligence, which discusses the 1943 sabotage of the Vemork heavy-water production plant in is “an edited version of an article which was originally published in 1947 Yearbook of the Norwegian Tourist Association.” The author helped to carry out the sabotage operation. I don’t have anything to add, except that it’s a fascinating account of the author’s experience.
It also includes this map:
