J. R. Sumner

Tectonic Significance of Gravity and Aeromagnetic Investigations at the Head of the Gulf of California

J. R. Sumner, 1972 .

Geophysical investigation of the structural framework of the Newark-Gettysburg Triassic basin, Pennsylvania

J. R. Sumner, 1977 .

Estimates of Strike-Slip Offset in Southwestern Arizona

G. A. Thompson, J. R. Sumner, 1974 .

The Sonora earthquake of 1887

J. R. Sumner, 1977, Bulletin of the Seismological Society of America.