Fruit-growing on the farm. I. Apples and pears. Agriculture 53: 71-6, 1946
Growing apples and pears in Minnesota. Minnesota Extension Service folders: (AG-FO-0432,rev), 1989
Less pruning of apples and pears for more fruit. Horticulture industry: 9-10, 1977
Control of fruit rot on apples and pears. Fruitteelt nieuws 13(14): 34-36, 2000