| Title | Preliminary Enumeration of the Lichens of Lancaster County, Pennsylvania. By A. Arthur Heller. Lancaster, PA |
| Abbreviation | Prelim. Enum. Lich. Lancaster |
| Authors | A. A. Heller |
| Publication Dates | 15 Feb 1893 |
| TL2 | 2.615 |
| Title | Preliminary Enumeration of the Lichens of Lancaster County, Pennsylvania. By A. Arthur Heller. Lancaster, PA |
| Abbreviation | Prelim. Enum. Lich. Lancaster |
| Authors | A. A. Heller |
| Publication Dates | 15 Feb 1893 |
| TL2 | 2.615 |