Greeting letter from Prof. Dr. Lena Halounova, Secretary General of the ISPRS – International Society for Photogrammetry and Remote Sensing for the Second GIS Day for Education held on 13th December 2018, Sofia, Bulgaria
Greeting letter from Prof. Dr. Lena Halounova, Secretary General of the ISPRS – International Society for Photogrammetry and Remote Sensing for the Second GIS Day for Education held on 13th December 2018, Sofia, Bulgaria