Elastic Waves in Layered Media (Ewing)

Elastic Waves in Layered Media (Lamont Geological Observatory contribution #189; New York et al.: McGraw-Hill, 1957), by W. Maurice Ewing, Wenceslas S. Jardetzky, and Frank Press (page images at HathiTrust)
New Online Books
http://catalog.hathitrust.org/Record/001485534