This issue has variants.
Additional information for this issue supplied by James Zanotto through the GCD Errors list, July 2009.
Letters from: Stephan F. Setter, Michael Burkhalter, and Tony Edwards.
Below the feature title, this is an Answer Man column, with questions from Frank Pugh, Glenn Walker, Kasey Mitchell, Patrick Zareiski, Jimmie Johnson, Dale A. West, Chris McMaster, Mark Katz, Daniel Kaufman, Steve Brunton, John Runion, Joe Ciarelli, Dictric [sic?] King, and Robert Marzec.