Vincent A. Fritz; Carl J. Rosen; Michelle A. Grabowski; William D. Hutchison; Roger L. Becker; Cindy Tong; Jerry A. Wright; Terry T. Nennich (). „Growing broccoli, cabbage and cauliflower in Minnesota”. University of Minnesota Extension, Garden – Growing Vegetables. Arhivat din original la . Accesat în .
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Vincent A. Fritz; Carl J. Rosen; Michelle A. Grabowski; William D. Hutchison; Roger L. Becker; Cindy Tong; Jerry A. Wright; Terry T. Nennich (). „Growing broccoli, cabbage and cauliflower in Minnesota”. University of Minnesota Extension, Garden – Growing Vegetables. Arhivat din original la . Accesat în .
