Columbia subject headings:
Caxton, William, approximately 1422-1491 or 1492.
Great Britain--History--Lancaster and York, 1399-1485.
Printing--Great Britain--History.
Rivers, Anthony Woodville, Earl, 1442?-1483.
Harvard subject headings:
Caxton, William, approximately 1422-1491 or 1492.
Great Britain--History--Lancaster and York, 1399-1485
Printing--Great Britain--History
Rivers, Anthony Woodville, 2d Earl, 1442?-1483.
Princeton subject headings: