Analysis of information sources in references of the Wikipedia article "Gruinard Island" in English language version.
Anthrax was the weapon of choice and between 1942 and 1943 [Dr Paul Fildes'] team from Porton Down took over the remote Scottish island of Gruinard, where they detonated a series of anthrax-laden bombs, testing their killing efficiency using sheep ... Dr Fildes obtained this anthrax from Prof R L Vollum – Professor of Bacteriology at Oxford University
Anthrax was the weapon of choice and between 1942 and 1943 [Dr Paul Fildes'] team from Porton Down took over the remote Scottish island of Gruinard, where they detonated a series of anthrax-laden bombs, testing their killing efficiency using sheep ... Dr Fildes obtained this anthrax from Prof R L Vollum – Professor of Bacteriology at Oxford University