Classic Planes. I called around to find a copy earlier this year and nobody had
one. The fellow from Rosemont Hobbies suggested it may be reissued soon.
You can get 1/72 line drawings in a book called Reconesance and Bamber
aircraft
of the 1914-1918 War, compiled by Lamberton.
Your best bet is to get a copy of the still available book:
"The German Giants; The story of the R-planes, 1914-1918" by George W.
Haddow.
This has 1/144 scale drawings, photos, written descriptions, hostories, etc of
all the German R-planes. An excellent book but it costs ~$65! I believe Putnam
is the publisher,
Also see if you can find the out-of-print Aircraft of WWI Archives. One of the
volumes covers the Zeppelin Staaken R-VI (?) and has 1/72 scale drawings.
Also, a report written by the French about a captured R-VI including drawings
etc is available for $15 from WWI Aero.
--Jesse