2
Hoffmann, Erik P.
| Pergamon Press |
1982
3
Landau, L. D.
| Pergamon Press |
1976
4
Hoffmann, Erik P.,
| Pergamon Press |
1982
5
Krashen, Stephen D.
| Pergamon Press |
1981
6
Grossberg, Stephen,
| Pergamon Press |
1989
7
Bennett, John William,
| Pergamon Press |
1976
8
Romanczyk, Raymond G.
| Pergamon Press |
1986
9
Dave, R. H.
| Published for the UNESCO Institute for Education b |
1976
10
Gatchel, Robert J.,
| Pergamon Press |
1979