2
by Berens, Hermann published: Leipzig: Peters, [ca. 1920]

3
by Berens, Hermann published: 1871

4
by Berens, Hermann published: 1860

5
by Berens, Hermann published: 1860

6
by Berens, Hermann published: 1857

7
by Berens, Hermann published: 1855

8
by Berens, Hermann published: 1854

9
by Berens, Hermann published: 1854

10
by Berens, Hermann published: 1853

11
by Berens, Hermann published: 1853

12
by Berens, Hermann published: 1847

14
15
16
17
18
20