APA (7th ed.) Citation

Allen, V. T., & Scheid, V. E. Nontronite in the Columbia river region.

Chicago Style (17th ed.) Citation

Allen, Victor T., and Vernon Edward Scheid. Nontronite in the Columbia River Region. n.p.

MLA (8th ed.) Citation

Allen, Victor T., and Vernon Edward Scheid. Nontronite in the Columbia River Region.

Warning: These citations may not always be 100% accurate.