| Farm Mechanization Planning, 2005 | 2005/5/5 | ||
| Farm Mechanization Planning, 2004 | update2004/5/31 | ||
| Systems Approach in Agriculture,2006 | update 2006/9/14 | ||
| Systems Approach in Agriculture,2004 | update 2004/8/5 | ||
| Tractor Dynamics by Vectors | update 1999/10/16 | 2004 | |
| Farm Mechanization in Japan | update 2001/8/26 | 2004 | |
| Agricultural Machinery Exhibition Room | update 2003/3/11 | 2004 |
update 2006/09/14
rev..2013/12/2