Flower-spot disease of cultivated azaleas
Weiss, F., Smith, F.F.
Flower-spot disease of cultivated azaleas - Washington 1940 - 1-28 p. - Disease United States Department of Agriculture. Circular No. 556 .
Flower-spot disease of cultivated azaleas - Washington 1940 - 1-28 p. - Disease United States Department of Agriculture. Circular No. 556 .