The Isa Diederiks-Verschoor Prize 1999: The Commercial Use of Telecommunications under the Framework of GATS - Air and Space Law View The Isa Diederiks-Verschoor Prize 1999: The Commercial Use of Telecommunications under the Framework of GATS by Yun Zhao - Air and Space Law The Isa Diederiks-Verschoor Prize 1999: The Commercial Use of Telecommunications under the Framework of GATS Yun Zhao 24 6 Air and Space Law