Extraction of Petroleum Hydrocarbons from Soil by Mechanical Shaking Schwab, A. P. ; Su, J. ; Wetzel, S. ; Pekarek, S. ; Banks, M. K. Abstract Publication: Environmental Science and Technology Pub Date: June 1999 DOI: 10.1021/es9809758 Bibcode: 1999EnST...33.1940S