Columbia subject headings:
Caseg Press--History.
Petts, J. (John)
Wood-engraving, Welsh--20th century.
Harvard subject headings:
Caseg Press--History.
Chamberlain, Brenda
Lewis, Alun, 1915-1944.
Petts, John, 1914-1991--Contributions in art publishing.
Petts, John, 1914-1991.
Private presses--Wales--History--20th century.
Wood-engraving, British--20th century.
Princeton subject headings:
Art publishing--Wales--History--20th century.
Caseg Press--History.
Petts, J. (John)--Contributions in art publishing.
Wood-engravers--England--Biography.