629.225 Bar T <a id="rdfa" resource="" property="dc:creator" href="http://viaf.org/viaf/91245159" target="_new">Barger, Edgar Lee</a> Tractors and their power units [by] E. L. Barger [and others] New York, J. Wiley [1958, c1952] 496 p. ilus., diagrs., tablas. 22 cm. (The Ferguson Foundation Agricultural engineering series) Bibliografía al final de los capítulos.