Writers: Carl Fallberg 1970-72; Pete Hansen c.1972-73; Mike Maltese c.1973; Bob Gregory c.1973-79; Mark Evanier 1975
Phil de Lara 1970-73 (from #1 onwards; the last issue he did should be #15, 10/73)
Warren Tufts 1973-79 (he did p/i/let on most issues from #16 to #71)
Pete Alvarado (He drew a few issues, including #79, which was inked by Bill Wright)
Joe Messerli (he drew the last few non-reprint issues in 1979).
The same artists drew the covers as well as the Inspector back-up stories.
Credit data from Alberto Becattini, November 2008.