This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
mm St Chamond railway gun diagram. Diagram showing firing setup for French mm St Chamond railway gun World War Railway Artillery Report on the Characteristics Scope of Utility Etc of Railway Artillery Volume page by Harry Miller United States Army Ordnance Department Washington Government Print Office Downloaded from archive