Columbia subject headings:
Harvard subject headings:
Ethnology--Research
Interdisciplinary research--History--Sources.
Interdisciplinary research--History.
Peisker, Johann, 1851-1933.
Social sciences--Research--History.
Princeton subject headings:
Ethnology--Research.
Interdisciplinary research--History--Sources.
Interdisciplinary research--History.
Peisker, Johann, 1851-1933.
Social sciences--Research--History.