1
2
by Berghaus, Hermann, 1828-1890
Published 1863
Table of Contents: ';
“...Lines of equal magnetic declination : epoch 1858 --...”Published 1863
Map
3
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5
by Berghaus, Hermann, 1828-1890
Published 1882
Table of Contents: ';
“...Lines of equal magnetic declination. Epoch 1880 --...”Published 1882
Map
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7
Published 1931
“...Magnet-Reklame...”
Map
8
Published 1931
“...Magnet-Reklame...”
Map