The broken lines depict unclaimed environmental subject matter.
The broken lines depict unclaimed environmental subject matter.
| Number | Date | Country | Kind |
|---|---|---|---|
| 000284450 | Jan 2005 | EM | regional |
| Number | Name | Date | Kind |
|---|---|---|---|
| D253400 | Vander Wilt | Nov 1979 | S |
| D253525 | Wilson | Nov 1979 | S |
| D275187 | Skarman | Aug 1984 | S |
| D279769 | Thornton et al. | Jul 1985 | S |
| D283407 | Fenne | Apr 1986 | S |
| D314719 | Gardner | Feb 1991 | S |
| D368041 | Skog | Mar 1996 | S |