@book{RobinGebbersErikaLueckJoergRuehlmann2013, author = {Robin Gebbers and Erika L{\"u}ck and J{\"o}rg R{\"u}hlmann}, title = {3rd Global Workshop on Proximal Soil Sensing 201326-29 May 2013 Potsdam, Germany}, isbn = {0947-7314}, year = {2013}, }