=============== P.F. Levelt =============== - Pieternel Felicitas - doctoraal Amsterdam VU - promotie Amsterdam VU 11 november 1992 - proefschrift: A coherent XUV-source for high resolution spectroscopy: application to diatomic molecules. - promotor: W. Hogervorst; copromotor: W.M.G. Ubachs. - KNMI - 1 september 2007 - satellietwaarnemingen van de atmosfeer - tot 2011