Gregory's Roman Military Architecture on the Eastern Frontier

[allobye]

Hello,

I am currently writing a paper on the fortifications on the eastern frontier of the Roman Empire in Late Antiquity and I was looking for the three volumes of Shelagh Gregory's 1997 thesis called Roman Military Architecture on the Eastern Frontier.

I can't seem to find these volumes anywhere online or in person; does anyone per chance have pdfs of these ?

Thank you so much,
Have a nice day