Richard J. Janda

The enormous Chillos Valley Lahar: an ash-flow-generated debris flow from Cotopaxi Volcano, Ecuador

Patricia Mothes, P. Mothes, R. Janda, 1998 .

Immediate and long-term hazards from lahars and excess sedimentation in rivers draining Mount Pinatubo, Philippines

Arturo S. Daag, Thomas C. Pierson, R. Janda, 1992 .