Hansen, Henry L. "Effects of 2, 4-D Sprays on Eastern White Pine (Pinus Strobus L.) Seedlings Growing Under Hazel Brush". North Central Weed Control Conference Research Report. 1949. 142-143.
Hansen, Henry L..
Effects of 2, 4-D sprays on eastern white pine (Pinus strobus L.) seedlings growing under hazel brush.
North Central Weed Control Conference.
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