Silurian.
Geologic relations and geographic distribution of the Silurian of Maryland /
by Charles K. Schwartz.

APA Citation

Schwartz, C. K. (1923). Silurian: Geologic relations and geographic distribution of the Silurian of Maryland. Baltimore: The Johns Hopkins Pr..

MLA Citation

Schwartz, Charles K. Silurian: Geologic Relations And Geographic Distribution of the Silurian of Maryland. Baltimore: The Johns Hopkins Pr., 1923.

Warning: These citations may not always be complete (especially for serials).