On analysis of white chalk from the County of Tyrone, with note on the occurrence of zinc therein, and in the overlying basalt /
Hardman, Edward T.(Edward Townley)
[London : s.n.,
1873]
"Extracted from the Geological Magazine, Vol. X., No. 10. October, 1873."--P. [1].
Title from caption.
Includes bibliographical references.
Chalk