CNRE publications https://orfeo.belnet.be/handle/internal/7946 Thu, 07 May 2026 00:29:28 GMT 2026-05-07T00:29:28Z CNRE publications https://orfeo.belnet.be:443/bitstream/id/81bfa4b6-b6fa-444e-a085-ef8f2ffd25ab/ https://orfeo.belnet.be/handle/internal/7946 Portrait de Sydney Chapman https://orfeo.belnet.be/handle/internal/13420 Portrait de Sydney Chapman Nicolet, M. https://orfeo.belnet.be/handle/internal/13420 Photochimie aéronomique https://orfeo.belnet.be/handle/internal/13419 Photochimie aéronomique Nicolet, M. https://orfeo.belnet.be/handle/internal/13419 The aeronomic problem of neutral helium and hydrogen https://orfeo.belnet.be/handle/internal/13410 The aeronomic problem of neutral helium and hydrogen Nicolet, M.; Kockarts, G. https://orfeo.belnet.be/handle/internal/13410 Theories on electron production an recombination in the D and E layers https://orfeo.belnet.be/handle/internal/13409 Theories on electron production an recombination in the D and E layers Nicolet, M. https://orfeo.belnet.be/handle/internal/13409