Scholarly Index
P. D. Usher
Pennsylvania State University; 437 total citations; 132 total publications; best world rank #173
Pennsylvania State University
437Total citations
132Total publications
11H-index
Published ranking records
| Field | Window | World rank | National rank | Impact score |
|---|---|---|---|---|
| History and Developments in Astronomy | Lifetime | 892 | US 454 | 88.65 |
| Historical Astronomy and Related Studies | 2021-2025 | 173 | US 21 | 14.72 |