Balsam wooly aphid predators native to Oregon and Washington
Mitchell, R.G.
Balsam wooly aphid predators native to Oregon and Washington - Corvallis 1962 - 63 p. - No. 62; Oregon Agricultural Ex .
Balsam wooly aphid predators native to Oregon and Washington - Corvallis 1962 - 63 p. - No. 62; Oregon Agricultural Ex .