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H. J. Hopen has written:

'Weed management guide for commercial vegetable growers, 1982'

'Herbicide guide for commercial vegetable growers, 1979'

'Herbicide guide for commercial vegetable growers, 1972'

'Herbicide guide for commercial vegetable growers, 1977'

'Seeding rates, cultivars, and planting methods for small processing onions (Alium cepa L.)' -- subject(s): Accessible book, Onions

'Weed management guide for commercial vegetable growers, 1985'

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11y ago

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