Book excerpt: CLASSIC TRACTORS OF THE WORLD covers the greatest, most significant, and most fascinating vintage farm tractor makes--from the Allis-Chalmers of the United Sttates to the Ferguson of England to the Zetor of Czechoslovakia. Nick Baldwin and Andrew Morland, both tractor experts, describe and illustsrate the development and history of these unique manufacturers. Chapters are orgnaized by country and include the tractors of Australia, Canada, France, Germany, Great Britain, Italy, Sweden, and the United States. The final chapter highlights additional tractor makes from countries such as Austria, the Soviet Union, Finland, and the Netherlands.