Pruning southern pines
Mattoon, Wilbur R.
Pruning southern pines - Washington 1942 - 1-34 p. - Pruning, Pines United States Department of Agriculture. Farmers Bulletin No. 1892 .
Pruning southern pines - Washington 1942 - 1-34 p. - Pruning, Pines United States Department of Agriculture. Farmers Bulletin No. 1892 .