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- [6] Letter from the executive director Photogrammetric Engineering and Remote Sensing, 2015, 81 (01):
- [7] LETTER FROM THE EXECUTIVE DIRECTOR PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING, 2014, 80 (03): : 200 - 200
- [8] LETTER FROM THE EXECUTIVE DIRECTOR PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING, 2014, 80 (01): : 4 - 4