I am a big fan of German WW1 Tanks and I'm currently interested in the LKIII project. The only illustration that I have seen in commercially available books and magazines thus far is a cutaway view of the vehicles rear power train. I also found an excellent side view by Tim Rigsby on the website www.landships.freeservers.com (in the "German Tanks" section of their forum) and another side view of a turreted vehicle from the Russian website www.pro-tank.ru. Unfortunately, the view contained in the latter is apparently an imagining of what a turreted LKIII might look like.
Although I have not seen these publications, there is apparently also some information about the LKIII in the following:
Kruger, Richard: Tanks, Entstehung, Bauart und Verwendung im Kriege. Autotechnische Bibliothek Band 66. Berlin 1921, Page 94.
Petter, Erich: Die technische Entwicklung der deutschen Kampfwagen im Weltkriege 1914/18. Typewritten Manuscript, Berlin October 1932, Page 121.
Do you know where I might obtain copies of the above pages and if possible any other sources of illustrations and/or plan views of the LKIII? I would be very grateful.