Historians William R. Scaife and William E. Erquitt wrote a book on the line in 1992, entitled the Chattahoochee River Line. The book contains much more information, including photographs of model Shoupades, details of construction, maps of the line and of troop movements, and more details about the Civil War in Cobb County.
http://www.riverline.org/Pages/TheStory.aspx

https://www.worldcat.org/title/chattahoochee-river-line-an-american-maginot/oclc/26334424&referer=brief_results

See also, Gen. F. A. Shoup’s article “Dalton Campaign—Works at Chattachochee River—An Interesting History”
Confederate Veteran, Vol. III, Sept. 1895, pp. 263/5