Study and investigation of boll weevil and hog cholera plagues. Letter from the secretary of agriculture, transmitting information regarding the study and investigation of the boll weevil and hog cholera plagues, as directed in House resolution no. 254, dated September 16, 1913 ..
United States. Dept. of Agriculture; Houston, David Franklin, 1866- [from old catalog]; United States. Bureau of animal industry. [from old catalog]; United States. Bureau of entomology. [from old catalog]; United States. Bureau of plant industry. [from old catalog]