| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| Poland China swine |
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| oldest breed of swine to have originated in the United States and one of the most popular. A number of strains have contributed to the development of this breed, notably the Irish Grazier and the Berkshire. Poland Chinas, among the largest of swine, are usually black; some have white spots on different parts of the body, particularly on the feet, nose, and tail. |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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