This Week's Letters

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Science  23 Feb 2001:
Vol. 291, Issue 5508, pp. 1487
DOI: 10.1126/science.291.5508.1487a

Letters in This Issue

What Is a Planet?

Mark McCaughrean, Neill Reid, Chris Tinney, Davy Kirkpatrick, Lynne Hillenbrand, Adam Burgasser, John Gizis, Suzanne Hawley. Response Maria Rosa Zapatero Osorio

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ADHD: Disorder or Discipline Problem?

Stephen V. Faraone and Joseph Biederman

Politics of the Census

David W. Murray. Response Kenneth Prewitt

Corrections and Clarifications

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