Endo, Elliot T., et al books & textbook
THE 1980 ERUPTION OF MOUNT ST HELENS, LOCATIONS, MAGNITUDES, AND STATISTICS OF THE MARCH 20-MAY 18 EARTHQUAKE SEQUENCE
From: Lipman, Peter W & Mullineau, Donal R (Eds), The 1980 Eruptions of Mount St /1981T Pamphlet
