Harp, Edwin L. “Instrumental Shaking Thresholds for Seismically Induced Landslides and Preliminary Report on Landslides Triggered by the October 17, 1989, Loma Prieta, California Earthquake”. Geografia Fisica e Dinamica Quaternaria 16, no. 1 (June 30, 1993): 13–15. Accessed April 5, 2026. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/707.