1. Button, E. F. and A. Hawkins. 1958. Foliar application of urea to potatoes. Am. Potato J. 35 (7): 559–572.
2. Dearborn, C. H. 1959. Alaska 114, a tough-skinned main crop potato. Univ. of Alaska Agr. Expt. Sta. Circ. 22.
3. Edmundson, W. E. 1935. Distance of planting rural New Yorker No. 2 and Triumph potatoes as affecting yield, hollow heart, growth cracks, and second growth tubers. U. S. Dept. of Agr. Circ. No. 338.
4. Federer, W. T. 1955. Experimental design. Macmillan Company, New York. N. Y.
5. Kellogg, C. E. and I. J. Nygard. 1951. Exploratory study of the principal soil groups of Alaska. U. S. Dept. Agr. Monograph No. 7.