Investigations of potato wart
Weiss, F., Orton, C.R., Hartman, R.E.
Investigations of potato wart - Washington 1923 - 1-21 p. - Investigation United States Department of Agriculture. Department Bulletin No. 1156 .
Investigations of potato wart - Washington 1923 - 1-21 p. - Investigation United States Department of Agriculture. Department Bulletin No. 1156 .