Gallegos, T J. (2014). Trends in hydraulic fracturing distributions and treatment fluids, additives, proppants, and water volumes applied to wells drilled in the United States from 1947 through 2010: Data analysis and comparison to the literature. Reston: USGS.

Trends in hydraulic fracturing distributions and treatment fluids, additives, proppants, and water volumes applied to wells drilled in the United States from 1947 through 2010 : Data analysis and comparison to the literature / by Tanya J. Gallegos and Brian A. Varela . — Reston : USGS, 2014. — Online-Ressource. — (Scientific investigations report ; 2014-5131)

Gallegos, Tanya J. Trends in Hydraulic Fracturing Distributions and Treatment Fluids, Additives, Proppants, and Water Volumes Applied to Wells Drilled in the United States From 1947 Through 2010: Data Analysis and Comparison to the Literature.Reston: USGS, 2014.