Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleThe International Union of Geodesy and Geophysics.AuthorsSTAGG, J. M.PublicationNature, 1947, Vol 160, Issue 4069, p558ISSN0028-0836Publication typeArticleDOI10.1038/160558a0