1. Hanneman, R.E. Jr. 1989. The potato germplasm resource. Am Potato J 66:655–667.
2. Hanneman, R.E. and J.B. Bamberg. 1986. Inventory of tuber-bearingSolanum species. Bull 533, Research Division, CALS, University of Wisconsin, Madison, 216 pp.
3. Hawkes, J.G. 1990. The potato. Belhaven Press, London. 259 pp.
4. Johnston, S.J., T.P.M. den Nijs, S.J. Peloquin and R.E. Hanneman, Jr. 1980. The significance of genic balance to endosperm development in interspecific crosses. Theor Appl Genet 57:5–7.
5. Kratzke, M.G. 1988. Study of the mechanism of calcium uptake by potato tubers and of cellular properties affecting soft rot. Ph.D. Thesis. Department of Horticulture, University of Wisconsin, Madison. 321 pp.