The ancient volcanoes of Oregon / by Howel WilliamsHowel Williams · First published 1969Open the Tome
Petrography; an introduction to the study of rocks in thin sections, by Howel Williams, Francis J. Turner, and Charles M. GilbertHowel Williams · First published 1954Open the Tome
Volcanic history of the Meseta Central Occidental, Costa RicaHowel Williams · First published 1952Open the Tome
Volcanoes of the Three Sisters region, Oregon CascadesHowel Williams · First published 1944Open the Tome
Geology of the Lassen Volcanic National Park, CaliforniaHowel Williams · First published 1932Open the Tome
Notes on the later geologic history of Tahiti (Society Islands)Howel Williams · First published 1930Open the Tome
A recent volcanic eruption near Lassen Peak, CaliforniaHowel Williams · First published 1928Open the Tome
