Harrows

Plowman's folly ; and, A second look

by Edward H. Faulkner.

International tractor disk harrow.

International Harvester Company of America.

Disk plows and disk harrows: section 8.2.5, US Army Corps of Engineers wildlife resources management manual

by Ted B. Doerr.

New Southern disk harrow.

International Harvester Company of America.

John Deere quality farm implements

Deere & Company

Spring- and spike-tooth harrows: section 8.2.6, US Army Corps of Engineers wildlife resources management manual

by Ted B. Doerr, Wilma A. Mitchell.

The Corbin wheel harrow, with seeder and leveler attachments

St. Lawrence Manufacturing Company, Prescott, Ont

Genuine spring-tooth harrow

Ayr Agricultural Works

Cockshutt farm implements: book H : improved models of disc and drag harrows.

Cockshutt Plow Co.

Cotton King disk harrow.

International Harvester Company of America.