1
by Holler, Martin, Sessar, Klaus
Published 1997
Centaurus Verlag & Media

3
by Rogers, Anne, Pilgrim, David
Published 1996
Macmillan Education UK

4
Published 1983
Springer Netherlands

5
Published 2001
Springer Netherlands

9
Published 2001
Springer Netherlands

10
Published 1973
Springer Netherlands

11
Published 1994
Springer Netherlands

13
by Lopez-Rey, Manuel, Germain, Charles
Published 1964
Springer Netherlands

14
by Leyden, Dennis Patrick, Grünhut, Max
Published 1960
Springer Netherlands

15
Published 1989
Springer Netherlands

16
Published 1979
Springer Netherlands

17
by Wetzel, Albrecht, Wilmanns, Karl
Published 1913
Springer Berlin Heidelberg

18
by von Hentig, Hans
Published 1955
Springer Berlin Heidelberg

19
Published 2003
Springer Netherlands

20
by von Hentig, Hans
Published 1962
Springer Berlin Heidelberg