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by U.S. Dept. of Agriculture
by Us Dept. of Agriculture; Chambers, Jackson
by Us Dept of Agriculture; Chambers, Jackson
by U.s. Dept. of Agriculture; Chambers, Jackson
by U.s. Dept of Agriculture; Porte, William S.; Entomology Research Division; et al.
by Milward, J. G.; U.s. Dept of Agriculture; Chambers, Roger
by U.s. Dept. of Agriculture; Chambers, Sam