Volume 55 in the Wellcome Witnesses to Contemporary Medicine series, 'A History of Bovine TB c.1965–c.2000' is now available to download free of charge here:
http://www.histmodbiomed.org/witsem/vol55
A printed copy can be ordered from www.amazon.co.uk; www.amazon.com; and all good booksellers for £6/$10 plus postage.
