Diseases of Poultry B. W. Calnek with H. J. Barnes, C. W. Beard, W. M. Reid & H. M. Yoder, JR (Eds) Iowa State University Press, Ames, Iowa; published outside North America and Canada by Wolfe Publishing Ltd., London, 9th ed, 1991 929 pp., £65.00 IBSN 0 7234 1706 7. Bird Keeping as a Source of Lung Cancer and Other Human Diseases: A need for higher hygienic standards Peter A. J. Holst Berlin, Springer Verlag, 1991 123 pp., U.S. $31 ISBN 3-540-53551-1
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