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- Kluge, Nikita Julievich
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- Kluis' Nurseries,
- Klukkert, Steven E
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- Knickelbein'S Wild Life Nurseries,
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- Knickerbocker Nurseries.
- Knickerbocker Nursery and Cactus Garden.
- Knickerbocker Nursery.
- Knickerbocker, William Skinkle, 1892-1972
- Knickknackius, Gripholdus
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- Knight & Gage Avocado Nursery.
- Knight & Struck Company.
- Knight and Struck Company.
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- Knight, Wilbur C. (Wilbur Clinton), 1858-1903
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- Knight-Bruce, A.
- Knight-Gray, Julianne
- Knight-Jones, Phyllis
- Knight's Avocado Nursery.
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- Knill, John Lawrence
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- Knoepffler, Louis-Philippe