Columbia subject headings:
Apologetics--History--19th century.
Apologetics--History--20th century.
Church of Scotland--Doctrines--History--19th century.
Church of Scotland--Doctrines--History--20th century.
Presbyterian Church--Doctrines--History--19th century.
Presbyterian Church--Doctrines--History--20th century.
Theologians--Scotland.
Theology, Doctrinal--Scotland--History--19th century.
Theology, Doctrinal--Scotland--History--20th century.
Harvard subject headings:
Apologetics.
Church of Scotland--Doctrines--History--19th century.
Church of Scotland--Doctrines--History--20th century.
Presbyterian Church--Doctrines--History--19th century.
Presbyterian Church--Doctrines--History--20th century.
Theologians--Scotland.
Theology, Doctrinal--Scotland--History--19th century.
Theology, Doctrinal--Scotland--History--20th century.
Princeton subject headings:
Apologetics--History--19th century.
Apologetics--History--20th century.
Church of Scotland--Doctrines--History--19th century.
Church of Scotland--Doctrines--History--20th century.
Presbyterian Church--Doctrines--History--19th century.
Presbyterian Church--Doctrines--History--20th century.
Theologians--Scotland.
Theology, Doctrinal--Scotland--History--19th century.
Theology, Doctrinal--Scotland--History--20th century.