@unpublished{TUW-183118, author = {Schuh, Harald}, title = {The Global Geodetic Observing System (GGOS) of the IAG (IAU Commission 19 Business Meeting)}, year = {2009}, note = {talk: IAU XXVIIth General Assemby, Rio de Janeiro; 2009-08-03 -- 2009-08-14} }