by Virgil E. Barnes
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Stratigraphy of the pre-Simpson Paleozoi...
The geology of the Oakesdale quadrangle
Representative sections of the Ellenburg...
Geology of the Llano region and Austin a...
San Angelo Geological Society presents V...
Field excursion
Occupational employment
Water-quality and hydrogeologic data for...
Twentieth Century Building Materials
Gypsiferous soils
On the effects of gypsum or plaster of P...
Gypsum in Canada