a) Arrangement used to achieve the focal point at x = 0, y = 0, z =... | Download Scientific Diagram
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Cold War Focal Point: Southeast Asia Today—and Tomorrow. Richard Butwell. Praeger, New York, 1961. x + 182 pp. Illus. Paper, $1.75. | Science
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Book review: “Semi-Classical Analysis for Nonlinear Schrödinger Equations: WKB Analysis, Focal Points, Coherent States” by Rémi Carles | EMS Press
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