Michel, U. Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IX. SPIE Digital Library.
Chicago-viite (17. p.)Michel, Ulrich. Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IX. SPIE Digital Library.
MLA-viite (9. p.)Michel, Ulrich. Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IX. SPIE Digital Library.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.