Columbia subject headings:
Agriculture--Scotland--Highlands--Early works to 1800.
Harvard subject headings:
Agricultural systems--Scotland--Highlands--Early works to 1800.
Agriculture--Scotland--Central Region.
Agriculture--Scotland--Highlands--Early works to 1800.
Agriculture--Scotland--Highlands.
Agriculture--Scotland--Tayside.
Central Region (Scotland)--Economic conditions.
Highlands (Scotland)--Economic conditions--18th century.
Tayside (Scotland)--Economic conditions.
Princeton subject headings: