Columbia subject headings:
O'Connor, William Douglas, 1832-1889. Good gray poet, a vindication.
Whitman, Walt, 1819-1892.
Harvard subject headings:
O'Connor, William Douglas, 1832-1889. The good gray poet, a vindication.
Whitman, Walt, 1819-1892
Princeton subject headings:
O'Connor, William Douglas, 1832-1889. The good gray poet, a vindication.
Whitman, Walt, 1819-1892.