Black current spreads white-pine blister rust
Detweler, Samuel B.
Black current spreads white-pine blister rust - Washington 1928 - 1-45 p. - Spread, Pine, Rust United States Department of Agriculture. Miscellaneous Publication No. 27 .
Black current spreads white-pine blister rust - Washington 1928 - 1-45 p. - Spread, Pine, Rust United States Department of Agriculture. Miscellaneous Publication No. 27 .