Ralph L. Langenheim

1922

• Geology along the highway route from Urbana, Illinois to San Francisco and Los Angeles, California and return via St. Joseph, Missouri, Denver, Colorado, Carson City, Nevada and Las Vegas, Nevada, Kingman, Arizona, Grand Canyon, Arizona, Albuquerque, New
• Mississippian and Devonian paleontology and stratigraphy Quartz Spring Area, Inyo County, California