Gum disease of citrus trees in California
Smith, R.E., Butler, O.
Gum disease of citrus trees in California - Berkeley 1908 - 294-327 -. - Disease, Trees California Agricultural Experiment Station. Bulletin No. 200 .
Gum disease of citrus trees in California - Berkeley 1908 - 294-327 -. - Disease, Trees California Agricultural Experiment Station. Bulletin No. 200 .