[Below: 1937 'Leitfaden der Technischen Nothilfe' (Guide of the Technical Emergency Corps). At the top it says 'Nur für Dienstgebrauch!', this just means 'For Official Use Only!' On each of the booklets you'll notice the words 'Abschnitt' followed by a letter, this just means 'Section' and is followed by the topic of the book, in this case it is 'Abschnitt E:' and beneath it says the words:

'Allgemeine Baukunde
Abstützungen und Aussteifungen'

which means:

(General Building Science

Supports and Braces).]

[Below: Eagle close-up.]

[Below: Ink stamp close-up.]

[Below: Opening page.]

[Below: Ink stamp close-up.]

[Below: 1937 'Leitfaden der Technischen Nothilfe'. (Guide of the Technical Emergency Corps). It says: 'Abschnitt D:' and is a reprint of the blue striped edition above.]

[Below: Eagle close-up.]

[Below: 1938 'Leitfaden der Technischen Nothilfe'. (Guide of the Technical Emergency Corps). This says: 'Abschnitt C:' and the word:

'Sprengen'

which means:

(explode, as in demolitions).]

[Below: Eagle close-up.]

[Below: Opening page.]

[Below: Ink stamp close-up.]

[Below: Eagle close-up.]

[Below: Page within.]

[Below: Page within, this says:

'Blindgänger!!
Lebensgefahr!'

(Duds!!
Risk of death!)

This is obviously dealing with unexploded bombs from Allied terror raids on German cities.]

[Below: 1939 'Leitfaden der Technischen Nothilfe'. (Guide of the Technical Emergency Corps). It says: 'Abschnitt D:' and is a reprint of the blue striped edition above.]

[Below: Opening page.]

[Below: Ink stamp close-up.]

[Below: 1939 'Leitfaden der Technischen Nothilfe'. (Guide of the Technical Emergency Corps). It says: 'Abschnitt E:' and is a reprint of the yellow striped edition above.]

[Below: Eagle close-up.]

[Below: 1940 'Leitfaden der Technischen Nothilfe'. (Guide of the Technical Emergency Corps). It says: 'Abschnitt D:' and is a reprint of the blue striped edition above.]