| Reference |
C. A. Velds, H. W. Grotendorst, J. H. Los and A. E. de Vries: Experiments on preconcentration of impurities in helium gas by thermal diffusion and the measuring of thermal diffusion factors In: Dragon Contractors Research and Development Symposium at A.E.R.E. Harwell, in March 1966, A.E.E. Winfrith, 1966. - pp. 1-71 |
