| Verfasser | Häufigkeit |
| MacGregor, Neil 1946- |
187 |
| Burns, James MacGregor 1918-2014 |
95 |
| MacGregor, Ewan |
53 |
| MacGregor, John |
51 |
| MacGregor, Geddes 1909-1998 |
38 |
| MacGregor, Arthur 1941- |
36 |
| MacGregor, David R. |
23 |
| Dawson, Robert MacGregor |
18 |
| Knox, MacGregor 1945- |
17 |
| MacGregor, Roy |
17 |
| MacGregor, Rob |
16 |
| Peltason, Jack W. 1923-2015 |
16 |
| MacGregor, Bryan D. |
15 |
| MacGregor, Ellen |
15 |
| MacGregor, James G. |
15 |
| MacGregor, Morris J. 1931- |
15 |
| Macgregor, George Hogarth Carnaby 1892-1963 |
15 |
| MacGregor, D. C. |
14 |
| MacGregor, Ronald J. |
14 |
| Cronin, Thomas E. |
13 |