| ID | Title | Type | Institution | Year |
|---|---|---|---|---|
| ID | Title | Type | Institution | Year |
| 101723 | Field Investigation into the Historical Occurences of Selected Tentatively Undetermined Species of Special Concern in PA | WRCP | ||
| 200942 | Field Survey of tentatively Undetermined Plant Species of Pennsylvania | WRCP | 1995 | |
| WRCP | Field Survey of Tentatively Undetermined Plant Species of Pennsylvania | WRCP | Independent Investigator |