"Addison, D.R." . . "JUVENILE NONFICTION / Transportation / Cars & Trucks" . . . . . . . . . . . . "Tractors at Work"@en . . "Juvenile works" . "Juvenile works"@en . "This book describes tractors, including their parts and their many uses."@en . "Introduces tractors, describing what they do and their parts." . . "Tractors at work" . "Electronic books" . . . . .