German article in Die Gartenlaube, 1897, no. 27

German article in Die Gartenlaube, 1882, no. 26

German article in Die Gartenlaube, 1885, no. 15

German article in Die Gartenlaube, 1895, no. 10

German article in Die Gartenlaube, 1899, no. 16

German article in Die Gartenlaube, 1888, no. 49

German article in Die Gartenlaube, 1886, no. 14

German article in Die Gartenlaube, 1896, no. 25

German article in Die Gartenlaube, 1884, no. 18

German article in Die Gartenlaube, 1888, no. 6

German article in Die Gartenlaube, 1896, no. 32

German article in Die Gartenlaube, 1892, no. 20

cuadro de Ludwig Blume-Siebert

German article in Die Gartenlaube, 1898, no. 16

German article in Die Gartenlaube, 1883, no. 27