Nota de fuente |
Tooley's dictionary of mapmakers, 1979---p. 334 [Vogel, Carl (1828-1897), Publisher and topographer who worked for the Geographische Anstalt (Geographical Institution) run by Justus Perthes in Gotha; from 1860 he specialised in depicting terrain on maps]
Österreichisch-Ungarische Monarchie, [1890]---(Bearbeitet von C. Volgel)
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