Walton, John R. Walton, John R.
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A Handbook of Pig Diseases
ISBN 9780853231561
Paperback, Liverpool University Press, 1987
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Study in the Diffusion of Agricultural Machinery in the Nineteenth Century
ISBN 9780901691057
Paperback, Univ. Oxf, Schl. of Geog., 1973
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Pet Pigs: Advice on Management, Training and Health Care
ISBN 9780853232582
Paperback, Liverpool University Press, 1992
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A Handbook of Pig Diseases
ISBN 9780853234289
Paperback, Liverpool University Press, 1993
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