Potatoes - Flowers, Tubers, Varieties and Cooking Qualities - Describes diversity of heirloom varieties, how to grow potatoes in no-dig beds and containers, and how to breed new varieties from seed. With photographs. - http://web.ukonline.co.uk/suttonelms/POT1.HTML
Ohio State University Extension: Growing Onions in the Home Garden - Features information on climatic and soil requirements, fertilizers, establishing, suggested varieties, cultural practices, and harvesting, curing and storing. - http://ohioline.osu.edu/hyg-fact/1000/1616.html
Ohio State University Extension: Growing Beets in the Home Garden - Features information on climatic requirements, soils and fertilizers acceptable for use on beets, establishing and planting, culture, harvesting and storage, and varieties. - http://ohioline.osu.edu/hyg-fact/1000/1604.html
Irish Eyes: How to Grow Potatoes - Guide includes alternative hilling techniques and how to get multiple crops in warmer climates. - http://www.gardencityseeds.net/growers10.php