I'm looking for a source, preferably the original atlas or set of documents in facsimile, for the following WW1 maps (and their siblings):
I've only found these fragments, reproduced on the Web and identified as coming from "British Official History", but can find no information that would lead me to a more complete, printed source.
Where are these maps originally from and who produced them? Are they, and others like them, currently available in print?