Search U.S. government technical reports digitized or harvested by TRAIL.
Study of preheating Colorado oil shale
Pilot-plant batch retorting of Colorado oil shale
Design of underground mine openings oil-shale mine, Rifle, Colo.
Oil yields of sections of Green River oil shale in Colorado, 1952-54
Oil-Shale mine, Rifle, Colo. :a review of design factors