1
by Strömgren, Elis
Published 1924
Springer Berlin Heidelberg

2
by Strömgren, Elis, Strömgren, Bengt
Published 1927
Springer Berlin Heidelberg

3
by Strömgren, Elis
Published 1922
Springer Berlin Heidelberg

4
by Strömgren, Elis, Strömgren, Bengt
Published 1933
Springer Berlin Heidelberg