Stratigraphy of the Lower Ordovician Axemann Limestone of central Pennsylvania /
by John A. Lees.

APA Citation

Lees, J. A. (1967). Stratigraphy of the Lower Ordovician Axemann Limestone of central Pennsylvania. Harrisburg: Pennsylvania Geological Survey.

MLA Citation

Lees, John A. Stratigraphy of the Lower Ordovician Axemann Limestone of Central Pennsylvania. Harrisburg: Pennsylvania Geological Survey, 1967.

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