File:1964. Research entomologist Charles Sartwell examining a ponderosa pine killed by mountain pine beetle. Lookout Mountain, near La Pine, Oregon. (35164397355).jpg
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![File:1964. Research entomologist Charles Sartwell examining a ponderosa pine killed by mountain pine beetle. Lookout Mountain, near La Pine, Oregon. (35164397355).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a8/1964._Research_entomologist_Charles_Sartwell_examining_a_ponderosa_pine_killed_by_mountain_pine_beetle._Lookout_Mountain%2C_near_La_Pine%2C_Oregon._%2835164397355%29.jpg/607px-thumbnail.jpg?20180504000218)
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