Articles

 Grizzlies: To Spare or Banish

H. A. Waldrop
Science 5 February 1971: 431.
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 Letters

Sherburne F. Cook, Jr.
Science 5 February 1971: 431.
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 Letters

Donald C. Lowrie
Science 5 February 1971: 431-432.
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 Letters

Gairdner B. Moment
Science 5 February 1971: 432-433.
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 Measuring Radioactive Materials

S. B. Garfinkel and W. B. Mann
Science 5 February 1971: 433-434.
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 Control of Agricultural Pests

Philip H. Abelson
Science 5 February 1971: 437.
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The History and Stability of Atmospheric Oxygen

Leigh Van Valen
Science 5 February 1971: 439-443.
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Mammalian Scent Marking

Katherine Ralls
Science 5 February 1971: 443-449.
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 Conditions Favoring Major Advances in Social Science

Karl W. Deutsch, John Platt, and Dieter Senghaas
Science 5 February 1971: 450-459.
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 '72 Budget: Nixon Proposes Modest Increases for Science

John Walsh
Science 5 February 1971: 459-463.
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 Star Bright, Street Light, Which Will They See Tonight?

Robert J. Bazell
Science 5 February 1971: 461.
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 Pine Bluff Saved, Detrick Critical

Philip M. Boffey
Science 5 February 1971: 462.
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 Corporate Responsibility: Group Rates Company Social Performance

Constance Holden
Science 5 February 1971: 463-466.
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 National Medal of Science Winners

S. B. M.
Science 5 February 1971: 464.
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 News in Brief

Science 5 February 1971: 465.
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 Book Reviews

Science 5 February 1971: 467-472.
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 Books Received

Science 5 February 1971: 472-473.
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Carbon, Carbides, and Methane in an Apollo 12 Sample

Sherwood Chang, Keith Kvenvolden, James Lawless, Cyril Ponnamperuma, and I. R. Kaplan
Science 5 February 1971: 474-477.
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Endogenetic Craters Interpreted from Crater Counts on the Inner Wall of Copernicus

Ronald Greeley and Donald E. Gault
Science 5 February 1971: 477-479.
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Lunar Metallic Particle ("Mini-Moon"): An Interpretation

David S. McKay, James L. Carter, and William R. Greenwood
Science 5 February 1971: 479-480.
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Solifluction: A Model Experiment

Akira Higashi and Arturo E. Corte
Science 5 February 1971: 480-482.
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Structure of Water in Microemulsions: Electrical, Birefringence, and Nuclear Magnetic Resonance Studies

Dinesh O. Shah and Roy M. Hamlin, Jr.
Science 5 February 1971: 483-485.
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Xenon Hexafluoride: Structural Crystallography of Tetrameric Phases

R. D. Burbank and G. R. Jones
Science 5 February 1971: 485-487.
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Opal Precipitation by Marine Gastropods (Mollusca)

Heinz A. Lowenstam
Science 5 February 1971: 487-490.
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Urea-Inorganic Phosphate Mixtures as Prebiotic Phosphorylating Agents

R. Lohrmann and L. E. Orgel
Science 5 February 1971: 490-494.
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Radioimmunoassay for Prostaglandins

Bernard M. Jaffe, Jay W. Smith, William T. Newton, and Charles W. Parker
Science 5 February 1971: 494-496.
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Adenosine 3', 5'-Monophosphate Phosphodiesterase in the Growth Medium of Physarum polycephalum

Andrew W. Murray, Marqie Spiszman, and Daniel E. Atkinson
Science 5 February 1971: 496-498.
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Allergic Encephalomyelitis: New Form Featuring Polymorphonuclear Leukocytes

Seymour Levine and Richard Sowinski
Science 5 February 1971: 498-499.
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 Promising Catalyst for Auto Exhaust

W. F. Libby
Science 5 February 1971: 499-500.
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 X-rays from Centaurus A and the Far-Infrared Background Radiation

R. Ramaty, E. T. Byram, T. A. Chubb, and H. Friedman
Science 5 February 1971: 500-501.
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 Prostaglandins

Gerald G. Anderson and Leon Speroff
Science 5 February 1971: 502-504.
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