Vintage Rolleiflex books, circa 1930's. A prolific author of the time was one Dr. Walther Heering. He seems to have been a great traveler, with a passionate affection for the Rollei. They feature lots of advice and elegant photography. Many have English editions that are very competently translated. Given the time frame, I have wondered when/if I would find something overtly Nazi, but with one exception they have been completely clean. "Das Goldene Buch der Rolleiflex" has a pic of the Rollei factory with two Nazi flags on the facade.
Also books from Ansco, Kodak, Ilford et al, from the 1930's-1940's Lots of nostalgia and occasionally a formula that seems worth trying. However, I have begun to wonder if I have not been doing something wrong all this time. Illustrations in these books invariably show a male darkroom (or other) worker wearing a white shirt and necktie. Apparently it is ok to roll up one's sleeves, and it also must help to smile at the chemistry. I have been known to curse at it with no apparent effect, but I have yet to try smiling.
Incidentally, the German language editions have something on the frontpiece that I don't quite understand. "11. bis 16. Tausend" or something similar. (The numerals differ between books.) This translates "11 to 16 thousand". Any ideas what is being said here?