Whilst browsing I have found these sites and I considered them to be of enough interest to include links to them. I cannot guarantee that any information found on these sites is accurate, but from what I have seen most of it appears to be fairly consistent with information I know to be reliable.

http://www.crosthwaiteandgardiner.com Crosthwaite and Gardiner - deal in the restoration and recreation of classic and historic race cars

http://www.pirro.com - Contains many interesting photos of Emanuele in action in various cars around the world. Emanuele has driven the Auto Unions and had quite a fun demonstration 'race' against a Mercedes at the Nurburgring.

http://www.dyna.co.za/cars/history2.htm - Interesting site from South Africa, where the Auto Unions raced in years gone by.

http://members.madasafish.com/~d_hodgkinson/brmlinks.htm- The site for all BRM enthusiasts and devotees, maintained by David Hodgkinson (the ultimate enthusiast I would imagine!)