Columbia subject headings:
Harvard subject headings:
Belgium--Description and travel--Early works to 1800.
Botanists--France--Diaries.
Netherlands--Description and travel--Early works to 1800.
Thouin, André, 1747-1824--Diaries.
Thouin, André, 1747-1824--Travel--Belgium.
Thouin, André, 1747-1824--Travel--Netherlands.
Princeton subject headings:
Belgium--Description and travel.
Netherlands--Description and travel.
Thouin, André, 1747-1824--Travel--Belgium.
Thouin, André, 1747-1824--Travel--Netherlands.