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National Research Council (USA). Committee on Pest and Pathogen Control through Management of Biological Control Agents and Enhanced Cycles and Natural Processes	Körperschaft	Washington, DC USA	5184736-X
National Research Council (USA). Committee on Rangeland Classification	Körperschaft	Washington, DC USA	5192795-0
National Research Council (USA). Committee on Long-Range Soil and Water Conservation	Körperschaft	Washington, DC USA	5122742-3