Circular No. 09/2020/TT-BGTVT dated April 23, 2020 on providing amendments to Circular 19/2017/TT-BGTVT on prescribing air navigation management and provision of air navigation services
Circular No. 09/2020/TT-BGTVT dated April 23, 2020 on providing amendments to Circular 19/2017/TT-BGTVT on prescribing air navigation management and provision of air navigation services