Rosas, Miluska A. Quantifying geomorphic change in Andean river valleys using UAV-PPK-SfM techniques: An example from the western Peruvian Andes - Amsterdam Elsevier August 2023 - 11 p. ilus. Subjects--Topical Terms: GEOMORFOLOGÍAEROSIONTOPOGRAFIAMONITOREO Subjects--Geographic Terms: PERUANDES