Columbia subject headings:
Merck, Carl Heinrich, 1761-1799--Diaries.
Natural history--Alaska.
Natural history--Russia (Federation)--Siberia.
Naturalists--Germany--Diaries.
Harvard subject headings:
Alaska--Discovery and exploration.
Merck, Carl Heinrich, 1761-1799--Diaries.
Natural history--Alaska
Natural history--Russia (Federation)--Siberia.
Naturalists--Germany--Diaries.
Siberia (Russia)--Discovery and exploration.
Princeton subject headings:
Diaries.
Merck, Carl Heinrich, 1761-1799--Diaries.
Natural history--Alaska.
Natural history--Russia (Federation)--Siberia.
Naturalists--Germany--Diaries.