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| 1 | Title: | The agricultural tractor, 1855-1950 | |
| Alt. Title: | Development of the agricultural tractor in the United States | ||
| Creator: | Gray, Roy Burton, 1884- | ||
| Publication: | American Society of Agricultural Engineers, Saint Joseph, Mich,1975. | ||
| Notes: | First published in 1954 under title: Development of the agricultural tractor in the United States. Includes indexes. | ||
| Call #: | TL233 G781 1975 | ||
| Extent: | 91, 60 p. : ill. ; 28 cm. | ||
| Subjects: | Farm tractors -- United States -- History | Agricultural machinery -- United States -- History | ||
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