| Title | Keuffel & Esser Co.. Letter |
| Genre | Letters (correspondence) |
| Form | correspondence |
| Call Number | ave_biggert_01040 |
| Date | 1891 |
| DOI | 10.7916/D82N6DBX |
| Companies | Keuffel & Esser Co. |
| Collector | Biggert, Robert |
| Current Location | Avery Architectural & Fine Arts Library, Columbia University |
| IIIF Manifest |  |
| Locations | New York, New York, United Statesadd_location |