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1.
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Geneva, Switzerland : International Union for the Protection of New Varieties of Plants, 2002.
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2.
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Geneva, Switzerland : International Union for the Protection of New Varieties of Plants, 2002.
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3.
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Geneva, Switzerland : International Union for the Protection of New Varieties of Plants, 2002.
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4.
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Geneva, Switzerland : International Union for the Protection of New Varieties of Plants, 2002.
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5.
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Geneva, Switzerland : International Union for the Protection of New Varieties of Plants, 2002.
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