Roth, Lawrence O. An introduction to agricultural engineering L. O. Roth, F. R. Crow, and G. W. A. Mahoney - Reprint Edition - Westport, Connecticut AVI Publishing Company c1975 - ix, 356 pages Illustrations 24 cm Includes index. ISBN: 0870551914 LCCN: 75025421 Subjects--Topical Terms: Agricultural engineering. LC Class. No.: S675 / .R67 Dewey Class. No.: 620/.002/4631