20210428155400.0 Geotechnical testing journal 0149-6115 Geotechnical testing journal. Geotechnical testing journal. 0149-6115 0149-6115 Pennsylvania http://journalsip.astm.org/gtj/ http://journalsip.astm.org/JOURNALS/GEOTECH/gtj_home.html Geotechnical testing journal http://enterprise.astm.org/SUBSCRIPTION/DIGITAL_LIBRARY/JOURNALS/GEOTECH/index.html 0149-6115 0149-6115