@book{2617, author = {Marr, W. Allen.}, title = {Nondestructive and automated testing for soil and rock properties.}, publisher = { American Society for Testing and Materials (ASTM)}, year = {1999.}, series = {STP ;}, address = {West Conshohocken :}, edition = {1st ed.}, note = {"ASTM stock #:STP1350."} }