•
Das Totenfeld von Ancón in Peru (Burial Grounds of
Ancon in Peru), Berlin (1880–86) with Alphons Stübel; translated into English as "The
necropolis of Ancon in Peru; a contribution to our knowledge of the culture and industries of the empire of the
Incas", etc. • English Translation:
The Necropolis of Ancon in Peru: A Contribution to Our Knowledge of the Culture and Industries of the Empire of the Incas, 3 vols : vol. 1, vol. 2, vol. 3 •
Kultur und Industrie südamerikanischer Völker (Culture and industry of South American people), Berlin (1889–90) •
Reisen in Südamerika (Journey in South America), Berlin (1890) •
Geologische Studien in der Republik Columbia (Geological studies in the Republic of Colombia), three volumes; Berlin (1892–99) •
Das Hochgebirge der Republik Ecuador (The highlands of the Republic of Ecuador), two volumes; Berlin (1892–1902) •
Ecuador 1870-74: petrographische Untersuchungen (Ecuador 1870-74:
petrographic investigations), Berlin (1901). ==Sources==