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Veterinary information to support practice, based on evidence and continuing education

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The Federal-State Co-operative programme against bovineTB. was continued in 24 counties and the Federal Jones-Connally (voluntary) plan [also for TB. control] was extended to include 27 counties. During the year 428, 272 cattle were tuberculin tested and of these 6, 244 animals (1-5%) reacted....

Duckworth, C. U.
Rep. Calif. Dep. Agric., 1936, 1937, pp 411-424 pp.