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John M. Krafft
1980-10-01 Issue: 4 • 40-42
1980-10-01 Issue: 4 • 29-38
John M. Krafft and Khachig Tölölyan
1980-10-01 Issue: 4 • 3-4
1980-10-01 Issue: 4 • 43
Mark Siegel
1980-10-01 Issue: 4 • 26-28
T. S. Tillotson
1980-10-01 Issue: 4 • 23-24
1980-10-01 Issue: 4 • 39
N. F. George
1980-10-01 Issue: 4 • 5-22
Bernard Duyfhuizen
1980-10-01 Issue: 4 • 25