Harthill, N. Symposium on Russian Airborne Geophysics and Remote Sensing. SPIE Digital Library.
Citazione stile Chigago Style (17a edizione)Harthill, Norman. Symposium on Russian Airborne Geophysics and Remote Sensing. SPIE Digital Library.
Citatione MLA (9a ed.)Harthill, Norman. Symposium on Russian Airborne Geophysics and Remote Sensing. SPIE Digital Library.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.