Bollweevil problem
Hunter, W.D., Coad, B.R.
Bollweevil problem - Washington 1923 - 1-30 p. - United States Department of Agriculture. Farmers Bulletin No. 1329 .
Bollweevil problem - Washington 1923 - 1-30 p. - United States Department of Agriculture. Farmers Bulletin No. 1329 .