Earthquake interpretations : a manual for reading seismograms /

by Simon, Ruth B., 1917-
Published 1981

Earthquakes in the United States, April-June 1974 /

by Simon, Ruth B., 1917-, Stover, Carl W., Person, W. J.

Earthquakes in the United States, July-September 1974 /

by Stover, Carl W., Simon, Ruth B., 1917-, Person, W. J.
Published 1976

Earthquakes in the United States, October-December 1974 /

by Stover, Carl W., Simon, Ruth B., 1917-, Person, W. J.
Published 1976

Earthquakes in the United States, January-March 1974 /

by Stover, Carl W.