GL0130-Manual on Subsurface Investigations: Geotechnical Site Characterization
2001, Mayne et al, NHI Manual, 295 pages, 15.7 MB pdf

GL0131-Geotechnical Investigations
2001, U.S.Army engineer manual, 148 Pages

GL0132-Geotechnical Manual
2000, Texas Department of Transportation, 231 Pages, 11.5MB pdf

GL0133-Manual for Preparation of Geotechnical Reports
2001, Los Angeles County, Department of Public Works, 95 Pages, 744 KB pdf

GL0134-Geotechnical Data Collection for Exploration Geologists
2001, Knight Pi?sold Consulting, 48 Pages, 3.8 MB pdf