It's the Simple Sabotage Field Manual and was made by the Office of Strategic Services (or in short the OSS). It was dissolved after WWII, one of its short lived successors was the Central Intelligence Group, the direct predecessor of the CIA.

Although the Wiki article contains a link to the manual on a US government site already, the Internet Archive also has a pdf of it.

a fascists govt that doesnt play ball with the USA that is.