J. R. Vanschaack

A GENERAL EARTHQUAKE-OBSER VATION SYSTEM (GEOS) BY R. D. BORCHERDT, J. B. FLETCHER, E. G. JENSEN, G. L. MAXWELL,

Edward Cranswick, J. R. Vanschaack, Richard E. Warrick, 1985 .

A general earthquake-observation system (GEOS)

Roger D. Borcherdt, E. G. Jensen, Edward Cranswick, 1985 .