A general discussion of this subject is not intended in this article, only the consideration of a deposit of pyrite in coal of a very unusual nature.
Proceedings of the Iowa Academy of Science
©1922 Iowa Academy of Science, Inc.
Lindly, J. M.
"Pyrite in Coal,"
Proceedings of the Iowa Academy of Science, 29(1), 107-109.
Available at: https://scholarworks.uni.edu/pias/vol29/iss1/16