The International BTD6 Crawler Tractor NIAE 4 page Test Report from 1956 manufactured by International Harvester in the United Kingdom. This 4-page report provides detailed information on the performance and capabilities of this crawler tractor, making it a valuable resource for those interested in agriculture, farming, and industrial machinery. With its comprehensive testing and evaluation, this report offers insights into the strengths and weaknesses of the International BTD6 crawler tractor, making it a valuable addition to any collection or database