E. D. HIRSCH (EDT)/ JOHN HOLDREN (EDT)
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E. D. Hirsch (EDT)/ John Holdren/ E. D. Hirsch
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E. D. Hirsch/ E. D. Hirsch (EDT)/ John Holdren (EDT)/ John Holdren/ Core Knowledge Foundation (COR)
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Hirsch, E. D.,Holdren, John P.,Briggs, Annaliese
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John Harte (EDT)/ Cheryl Holdren/ Richard Schneider/ Christine Shirley
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John P. Holdren (FRW)/ Jonathan Garo Koomey
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Kelly Sims Gallagher, Xiaowei Xuan, John P. Holdren , Zhang Junkuo , Michael E. Kraft
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