@article{451,
      author       = "Merry, C. L. and Gysen, H. van and University Cape Town and
                      19. IUGG - Vancouver, Aug. 9-22, 1987",
      title        = "A regional geoid for southern Africa  ",
      year         = "1987",
      note         = "Liter. - Obr. a tab. v příl., 1 sv., více autorů",
}