Technical Library
- R66 Owners handbook (English language) (published 1938) (5.6 MB)
- R66 Owners handbook (German language) (published 1938) (7.5 MB)
- R66 Owners handbook (German language) (published 1939) (7.0 MB)
- R66 parts manual (German language) (published 1938) (14.5 MB)
- R66 parts manual (German language) (published 1939) (6.9 MB)
- R66 parts manual (German language) (published 1941) (2.0 MB)
- R66 parts manual (German language) (published 1942) (8.9 MB)