Hi Kieth
Here's a couple more for you to add
Howard Hawks American Artist a BFI production by Jim Hellier & Peter Wallen
1996
The Complete films of John Huston by John Mccarty Citadel Press Syracusse New Jersey
King Vidor American by Raymond Durgnat & Scott Simpson UCL Press 1988
Zanuck - The Rise and fall of Hollywoods Last Tycoon by Leonard Mosely
Granada Publishing 1984
Allan Dwan- The Last Pioneer by Peter Bogdanovitch 1971
Movie Magazine limited Produced by November Books Limited
And finally:-
Volumes 1 & 3 of the Hollywood Professionals by Kingsley Canham published by the Tantivy Press London A.S.Barnes & Co New York
Vol 1 deals with Michael Curtiz
Raoul Walsh
Henry Hathaway
Vol 3 Covers Howard Hawks
Hope this helps
Regards
Arthur