The building materials of Pennsylvania.
I.--Brownstones,
by Thomas C. Hopkins.

APA Citation

Hopkins, T. Cramer., Pennsylvania State College. (1897). The building materials of Pennsylvania: I.--Brownstones. [Harrisburg: Busch, State Printer.

MLA Citation

Hopkins, Thomas Cramer, 1861-, and Pennsylvania State College. The Building Materials of Pennsylvania: I.--Brownstones. [Harrisburg: Busch, State Printer, 1897.

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