The Kempton-Wace Letters was created in 1903.
Letters of Insurgents was created in 1976.
Catalysis Letters was created in 1988.
Persian Letters was created in 1721.
Letters to Jenny was created in 1994-10.
Letters from Wolfie was created in 2004-05.
We Get Letters was created in 1957-09.
Letters to Ottla was created in 1974.
Letters From War was created in 2003.
Electronics Letters was created in 1965.
FEBS Letters was created in 1968.
Letters to Laugh-In was created in 1969.
Cancer Letters was created in 1975.
Nano Letters was created in 2001.
Letters from Iceland was created in 1937.
Tetrahedron Letters was created in 1959.
Letters of Junius was created in 1772.
Letters of Agrippa was created in 1787.