Apr 28 MD, Glen Burnie. Arthur Slade Sports Card Show, School Cafeteria. 120 Dorsey Rd., SH: 9am-3pm, T: 80-6’, F: $35. for 12’, A: free. Leo Zerhusen, 329 Double Eagle Dr., Linthicum, MD 21090. PH: 410-859-1297 or 766-7130.