K.I. van Onselen
Publications on Geodesy 49, Delft, 2000, ISBN-13: 978 90 6132 273 3, ISBN-10: 90 6132 273 1, 220 pagina’s (Ch. 1-5).
Publications on Geodesy 49, Delft, 2000, ISBN-13: 978 90 6132 273 3, ISBN-10: 90 6132 273 1, 220 pagina’s (Ch. 6-end).