The Precambrian geology of the Reading 15’ quadrangle / by Tracy V. Buckwalter.

Chicago citation style
Buckwalter, Tracy V. (Tracy Vere), 1918. The Precambrian geology of the Reading 15’ quadrangle / by Tracy V. Buckwalter.. Retrieved from the Digital Public Library of America, https://archive.org/details/precambriangeolo00buck. (Accessed September 21, 2018.)
APA citation style
Buckwalter, Tracy V. (Tracy Vere), 1918, The Precambrian geology of the Reading 15’ quadrangle / by Tracy V. Buckwalter.. Retrieved from the Digital Public Library of America, https://archive.org/details/precambriangeolo00buck
MLA citation style
Buckwalter, Tracy V. (Tracy Vere), 1918. Retrieved from the Digital Public Library of America <https://archive.org/details/precambriangeolo00buck>.
Note: These citations are programmatically generated and may be incomplete.