APA

W. & B. Douglas' descriptive catalogue and price list patent metallic pumps, hydraulic rams, chains pumps, garden engines, and other hydraulic machines, hardware, etc., manufactured at their works in middletown, Connecticut. The oldest and most extensive establishment of the kind in the United States of America. Branch warehouses, Nos. 85 and 87 John street, New York, and 197 lake street, Chicago, Ill. Middletown, Conn., U. S. A. : s.n., 1868: .

Chicago

W. & B. Douglas' descriptive catalogue and price list patent metallic pumps, hydraulic rams, chains pumps, garden engines, and other hydraulic machines, hardware, etc., manufactured at their works in middletown, Connecticut. The oldest and most extensive establishment of the kind in the United States of America. Branch warehouses, Nos. 85 and 87 John street, New York, and 197 lake street, Chicago, Ill. Middletown, Conn., U. S. A. : s.n., 1868: .

Harvard

W. & B. Douglas' descriptive catalogue and price list patent metallic pumps, hydraulic rams, chains pumps, garden engines, and other hydraulic machines, hardware, etc., manufactured at their works in middletown, Connecticut. The oldest and most extensive establishment of the kind in the United States of America. Branch warehouses, Nos. 85 and 87 John street, New York, and 197 lake street, Chicago, Ill. Middletown, Conn., U. S. A. : s.n., 1868: .

MLA

Middletown, Conn., U. S. A. : s.n., 1868: . .