@unpublished{TUW-183164, author = {Schuh, Harald}, title = {The Global Geodetic Observing System (GGOS) of the IAG}, year = {2009}, note = {talk: Universidade Estado Federal Sao Paulo (Unesp), Presidente Prudente, Sao Paulo, Brasilien; 2009-08-19 -- 2009-08-21} }