File:1960. William Klein checking control effectiveness in ponderosa pine tree sprayed with ethylene dibromide to control mountain pine beetle (Dendroctonus monticolae). Bauer's Creek area. Fremont National Forest, Oregon. (38707561201).jpg
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![File:1960. William Klein checking control effectiveness in ponderosa pine tree sprayed with ethylene dibromide to control mountain pine beetle (Dendroctonus monticolae). Bauer's Creek area. Fremont National Forest, Oregon. (38707561201).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/54/1960._William_Klein_checking_control_effectiveness_in_ponderosa_pine_tree_sprayed_with_ethylene_dibromide_to_control_mountain_pine_beetle_%28Dendroctonus_monticolae%29._Bauer%27s_Creek_area._Fremont_National_Forest%2C_Oregon._%2838707561201%29.jpg/750px-thumbnail.jpg?20180508200647)
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