American Society of Civil Engineers. Committee on Sampling and Testing & Hvorslev, M. J. (1949). Subsurface exploration and sampling of soils for civil engineering purposes: Report on a research project.
Dyfyniad Arddull ChicagoAmerican Society of Civil Engineers. Committee on Sampling and Testing and M. Juul Hvorslev. Subsurface Exploration and Sampling of Soils for Civil Engineering Purposes: Report on a Research Project. [Vicksburg?], 1949.
Dyfyniad MLAAmerican Society of Civil Engineers. Committee on Sampling and Testing and M. Juul Hvorslev. Subsurface Exploration and Sampling of Soils for Civil Engineering Purposes: Report on a Research Project. 1949.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.