This issue has variants.
At least three printings of this exist. Third printing is clearly labeled in the indicia and also has only the US price on the cover, not British or Canadian prices. The third printing also has the CCA stamp which is not on the 1st printing's cover.
Letters from readers: Jason Bak, Andrew Todd, Danny Woipiat, Mark Salom, Brian Bolchelmann, David Saove, James H. Baker, Samson Tam, Carlo Tarini, Steven Mancil, Dave Nowik