This image is from a comic book image scanned for Scooby-Doo LiveJournal. The poster of the article (brendala.livejournal.com) asked for credit and a link to their site.
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A long-running theme of having the various incarnations of Daphne Blake getting kidnapped or...
The Four Flushers is the second of four stories in Scooby Doo... Where Are You!#6, by Charlton...