| Issuer | Date | Desc | State | ||
| - | no image | Liberia | 8/3/1993 | empty sheet (#34287) | incomplete |
| - | no image | Liberia | 8/3/1993 | empty sheet (#34288) | incomplete |
| - | no image | Liberia | 8/3/1993 | empty sheet (#34289) | incomplete |
| - | no image | Liberia | 8/3/1993 | empty sheet (#34290) | incomplete |
| - | no image | Liberia | 10/14/1993 | Flora of Liberia 1993, sheet of 12 types | |
| - | no image | Liberia | 11/18/1993 | Wildlife of Liberia 1993, sheet of 12 types |