Geology of tight gas reservoirs in the Pinedale anticline area, Wyoming, and at the Multiwell Experiment site, Colorado / ed. B. E. Law, ed. C. W. Spencer, 1989. - Pag. var. var. - Текст : непосредственный.
Pitman J.K. Petrography, mineralogy, and reservoir characteristics of the upper Cretaceous Mesaverde Group in the East-Central Piceance Basin, Colorado / J.K.Pitman,C.W.Spencer,R.M.Pollastro, 1989. - 31 p. - Текст : непосредственный.