@unpublished{TUW-187478, author = {Wagner, Wolfgang}, title = {A short introduction to microwave remote sensing of the land surface}, year = {2010}, note = {invited; talk: 5th ESA Earth Observation Summer School on Earth System Monitoring {\&} Modelling, ESA-ESRIN, Frascati, Italy; 2010-08-02 -- 2010-08-13} }