File:1933. James A. Beal with climbing spurs and rope, removing bark from Dendroctonus brevicomis (western pine beetle) infested tree for determination of emergence. Sisters, Oregon. (34203638103).jpg
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![File:1933. James A. Beal with climbing spurs and rope, removing bark from Dendroctonus brevicomis (western pine beetle) infested tree for determination of emergence. Sisters, Oregon. (34203638103).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/1933._James_A._Beal_with_climbing_spurs_and_rope%2C_removing_bark_from_Dendroctonus_brevicomis_%28western_pine_beetle%29_infested_tree_for_determination_of_emergence._Sisters%2C_Oregon._%2834203638103%29.jpg/427px-thumbnail.jpg?20180503233957)
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