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# You should be able to execute "make 20.perturbation.edit" if you view this page at 
# the <A HREF=http://sepwww.stanford.edu/>Stanford Exploration Project</A>,     
# or (as an SEP sponsor) get the SEP environment from the Web or on a CD-ROM.
# Remember to open the page with "file:/" rather than "http://"...
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/wrk1/sep111/paul1 20.perturbation.edit