Additional information on the author Robert Dobell.

Additional information on the author Robert Carnie.

Additional information on the author Robert Birley.

Additional information on the author Robert B. Downs.

Additional information on the author Robert Ashby.

Additional information on the author Richard Pankhurst.

Additional information on the author Richard Ovenden.

Additional information on the author Richard Landon.

Additional information on the author Richard Gullible.

Additional information on the author Richard Garnett.