Harrise (Henry): Bibliotheca Americana Vetustissima, Leipzig, 1921, 4to -- Hildeburn (Charles): A Century of Printing the Issues of the Press in Pennsylvania, 1685-1784, New York, 1968, 2 vols., 8vo -- Stanton (Frances) and Marie Tremaine: A Bibliography of Canadiana, Toronto, 1934, 4to -- Littlefield (George): The Early Massachusetts Press, 1638-1711, New York, 1969, 8vo -- Shaaber (M.A.): Sixteenth-century Imprints in the Libraries of the University of Pennsylvania, Pennsylvania, 1976, 8vo; and 4 others. (10)