Instruct: Classify an Amazon review as either positive or negative.
Query: Fun with FORTRAN

This book is not an opportunity to use the earth to explain continuous media. Continuum mechanics explains much of the behavior that is observed on the earth. S&W is hardcore geophysics - not for the faint-hearted! The book does still use FORTRAN - can we please move on? But the derivation of the wave equation in the second chapter is a key for any PhD wanna-be to learn for their comps.