John Deere Horicon Works; entitled "F510 and F525 Front Mowers"; published in the United States in 1988; front cover, inside cover, and pp. 49 and 50. |
John Deere Horicon Works: entitled "John Deere Front Mowers for Residential Use"; published in the United States in 1988; front page. |
John Deere Horicon Works; entitled "48 and 52-Inch Commercial Walk-Behind Mowers Operator's Manual"; published in the United States in 1988; front cover, inside cover, and pp. 14 and 15. |
Hesston Corporation; entitled "Woods Mow'n Machine"; published in the United States in 1988; front cover, and pp. 2 and 3. |