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EXPERIMENTS ON NUCLEAR ORIENTATION AT VERY LOW TEMPERATURES .1. ESTABLISHMENT OF A METHOD OF NUCLEAR ALINEMENT AND ITS APPLICATION TO COBALT-60
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[2]
EXPERIMENTS WITH AN ANISOTROPIC MAGNETIC CRYSTAL AT TEMPERATURES BELOW 1-DEGREE-K
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PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES,
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[3]
POPPEMA, 1954, THESIS GRONINGEN