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"Field of lettuce being irrigated on experimental farm at Avon. Note irrigation furrows halfway between rows." In: High Altitude Vegetable Growing: Lettuce--Cauliflower--Peas, by R. A. McGinty. Fort Collins, Colorado Experiment Station, Horticultural Division, Bulletin No. 309, May, 1926. p.13.
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"Making lettuce crates. Packing and loading platform in right background." In: High Altitude Vegetable Growing: Lettuce--Cauliflower--Peas, by R. A. McGinty. Fort Collins, Colorado Experiment Station, Horticultural Division, Bulletin No. 309, May, 1926. p.19.
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"Lettuce fertilizer plots, experimental farm, Avon. Elevation, 8,000 feet." In: High Altitude Vegetable Growing: Lettuce--Cauliflower--Peas, by R. A. McGinty. Fort Collins, Colorado Experiment Station, Horticultural Division, Bulletin No. 309, May, 1926. p.10.
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"Growers inspecting experimental plots of lettuce and peas at College Farm, Avon." In: High Altitude Vegetable Growing: Lettuce--Cauliflower--Peas, by R. A. McGinty. Fort Collins, Colorado Experiment Station, Horticultural Division, Bulletin No. 309, May, 1926. p.28.