| Verfasser | Häufigkeit |
| Library of Congress Division of Bibliography |
11 |
| Library of Congress General Reference and Bibliography Division |
10 |
| Burr, Nelson R. 1904-1994 |
3 |
| Griffin, A. P. C. 1852-1926 |
1 |
| Library of Congress (Washington, DC) Geography and Map Division Reference and Bibliography Section |
1 |
| Library of Congress <Washington, DC> General Reference and Bibliography Division |
1 |
| Meyer, Hermann Henry Bernard |
1 |