book by Karl Ruß, volume 2 of "Die sprechenden Vögel"

German article in Die Gartenlaube, 1868, no. 25

German article in Die Gartenlaube, 1868, no. 28

German article in Die Gartenlaube, 1868, no. 39

German series in Die Gartenlaube, 1865-66

German article in Die Gartenlaube, 1893, no. 51

German article in Die Gartenlaube, 1866, no. 30

German article in Die Gartenlaube, 1887, no. 34

German article in Die Gartenlaube, 1880, no. 7

book by Karl Ruß

German article in Die Gartenlaube, 1865, no. 38

German article in Die Gartenlaube, 1892, no. 9

book by Karl Ruß

German article in Die Gartenlaube, 1885, no. 40

German article in Die Gartenlaube, 1866, no. 52

book series by Karl Ruß

German article in Die Gartenlaube, 1885, no. 52

book by Karl Ruß, volume 1 of "Die sprechenden Vögel"

two-volume publication by Karl Ruß

German article in Die Gartenlaube, 1884, no. 2

German article in Die Gartenlaube, 1878, no. 34

Hannover, Carl Rümpler, 1878.

German article in Die Gartenlaube, 1885, no. 4

German article in Die Gartenlaube, 1885, no. 47

German article in Die Gartenlaube, 1888, no. 45

German article in Die Gartenlaube, 1868, no. 42

German article in Die Gartenlaube, 1889, no. 30

German article in Die Gartenlaube, 1890, no. 6

German article in Die Gartenlaube, 1892, no. 19

German article in Die Gartenlaube (1865–1885)

German article in Die Gartenlaube, 1878, no. 43

German article in Die Gartenlaube, 1869, no. 39

German article in Die Gartenlaube, 1886, no. 24

German article in Die Gartenlaube, 1865, no. 47

German article in Die Gartenlaube, 1889, no. 27

German article in Die Gartenlaube, 1883, no. 43

German article in Die Gartenlaube, 1883, no. 30

German article in Die Gartenlaube, 1894, no. 14

German article in Die Gartenlaube, 1894, no. 30