
| 保存日(永続的識別子) | |
|---|---|
http://www.water.go.jp/honsya/honsya/news/letter/lettertop.html |
|
| 2004/09/16(info:ndljp/pid/259571) |
|
http://www.water.go.jp/referenc/letter/f_lettertop.html |
|
| 2003/11/29(info:ndljp/pid/233534) |
|
| 2003/08/29(info:ndljp/pid/237512) |
|
| 2003/05/11(info:ndljp/pid/236876) |
|
| 2003/02/17(info:ndljp/pid/236442) |
|