Freakonomics Quiz: Anointing the King

As we begin work on the illustrated version of SuperFreakonomics, I’ve been delving deeper into my father’s illustrious career in medical research. As some of you may know, he earned the moniker the “King of Farts” for his pathbreaking work on flatulence.
So in my continual (and seemingly fruitless) attempt to stump the readers of this blog, I offer what may be the most difficult Freakonomics quiz ever:
What magazine was the first to use the phrase “King of Farts” in reference to my father’s research?
The usual Freakonomics schwag to the first commenter to identify the magazine.