I was given a copy of Ruth's book as a guide to interpreting 
seismograms when I first began working in seismology at the 
World-Wide Seismograph Station Network station MSO in Missoula, 
Montana.  That was about 30 years ago.  I still have her book and 
it's still a gem.


Bob Hammond

Public Seismic Network - Alaska
http://apsn.awcable.com

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