Oliver Tractors Jeff Hackett and Sherry Schaefer. The 1929 merger of American Seeding Machine, Hart-Parr Tractor, Nichols and Shepard, and Oliver Chilled Plow Works was largely a response to the market domination of John Deere and International Harvestor, but its complementary product lines proved a successful recipe until Oliver's buy-out in 1960s by the White Motor Corporation. This all-color history begins with a brief overview of the four companies and its products prior to the merger. It then examines a gallery of great tractors produced by Oliver under the Oliver, Oliver Hart-Parr, Cockshutt. Paperback 96 Pages Price $13.99 Cockshutt: The Comlete Story Price $25.99