13 lecture notes signed by the greats of the second half of the 20th century

13 signed lecture notes.  They include: Topper Martin-(2), Ali Bongo (2),  Harold Martin, Terry Seabrooke, Dale Salwak, Werner Dornfield (Dorny), John Mendoza, SId Lorraine, Trevor Lewis, Ron London and , Dick Olsund.  All in very good condition. Less than $7 each!