• J. Eck, Excitation of helium by protons and hydrogen atoms and polarization of the resulting radiation, University of Amsterdam, 1964-01-29

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  • C. J. G. Slieker, Thermal diffusion of asymmetric molecules, Delft University of Technology, 1964-01-16

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  • P. K. Rol, I. Het meten van lage gasdrukken (10-2-10 Torr), De Ingenieur 76, 1-6 (1964)

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  • J. H. Los and C. A. Velds: Preconcentration of impurities by thermal diffusion in the helium purification flow of the dragon reactor In: Proceedings of the Symposium on the Less Common Means of Separation, 24-26 April, 1963 /ed. J. M. Pirie, Institution of Chemical Engineers, 1964. - pp. 86-93

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  • A. E. Vries and R. A. Haring, Inversion temperature in the separation of isobaric CO molecules by thermal diffusion, Z. Naturforsch. Teil A 19, 225-230 (1964)

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  • F. Valk, Thermal diffusion in ternary mixtures III. Hydrogen and helium isotopes, Physica 30, 729-740 (1964)

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  • W. J. Wet and J. H. Los, The separation of light gaseous isotopes by mass diffusion columns I, Z. Naturforsch. Teil A 19, 740-746 (1964)

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  • A. E. Vries and F. S. Klein, Ultraviolet-induced isotope exchanges in gaseous mixtures of HCl and D2 and of DCl and H2, J. Chem. Phys. 41, 3428-3435 (1964)

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  • F. J. Heer and J. Bos, Excitation of helium by helium ions, Physica 30, 741-744 (1964)

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  • J. W. R. Fennema: On the impact parameter treatment of excitation ionization and charge transfer processes In: Atomic Collision Processes : the Proceedings of the Third International Conference on the Physics of Electronic and Atomic Collisions, London, 22nd-26th July, 1963 /ed. M. R. C. McDowell, North-Holland, 1964. - pp. 779-789

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