Columbia subject headings:
Ball, John, -1381.
Great Britain--History--Richard II, 1377-1399.
Tyler's Insurrection, 1381.
Harvard subject headings:
Ball, John, -1381.
Great Britain--History--Richard II, 1377-1399.
Tyler's Insurrection, 1381.
Princeton subject headings:
Ball, John, -1381.
Priests, English--Biography.
Tyler's Insurrection, 1381.