21
Comenius, Johann Amos
| Adam and Charles Black |
1986
23
Abbott, Edwin Abbott
| Adam and Charles Black |
1986
24
Abbott, Edwin Abbott
| Adam and Charles Black |
1986
25
Schweitzer, Albert
| Adam and Charles Black |
1986
26
Harnack, Adolf von
| Adam & Charles Black |
1986
27
Gray, G. Buchanan
| Adam and Charles Black |
1985
28
Gardner, Percy
| Adam and Charles Black |
1985
29
Pearson, Karl
| Adam and Charles Black |
1985