Problems Of Nature: Researches And Discoveries Of Gustav Jaeger M.d., Selected From His Published WritingsGustav JägerEsaurito4,3Avvisami
Selection From Essays on Health-culture and the Sanitary Woollen SystemGustav JägerEsaurito4,3Avvisami
Enzyklopädie der Naturwissenschaften Abth., 2. Th. Handwörterbuch der AstronomieGustav JägerEsaurito4,3Avvisami
