Schlebecker, John T. Agricultural Implements and Machines in the Collection of the National Museum of History and Technology. Smithsonian Studies in History and Technology, 17. Washington, D.C.: Smithsonian Institution Press, 1972.

Schlebecker, John T. Agricultural Implements and Machines in the Collection of the National Museum of History and Technology. Smithsonian Studies in History and Technology, 17. Washington, D.C.: Smithsonian Institution Press, 1972.

Schlebecker, John T. Agricultural Implements and Machines in the Collection of the National Museum of History and Technology. Smithsonian Studies in History and Technology, 17. Washington, D.C.: Smithsonian Institution Press, 1972.

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Schlebecker, John T. Agricultu ...... onian Institution Press, 1972.

Schlebecker, Agricultural Implements and Machines(1972)

Schlebecker, John T. Agricultural Implements and Machines in the Collection of the National Museum of History and Technology. Smithsonian Studies in History and Technology, 17. Washington, D.C.: Smithsonian Institution Press, 1972.

Schlebecker, John T. Agricultural Implements and Machines in the Collection of the National Museum of History and Technology. Smithsonian Studies in History and Technology, 17. Washington, D.C.: Smithsonian Institution Press, 1972.