38. Dietz PE, Sears AE: Pornography and obscenity sold in "adult bookstores": A survey of 5132 books, magazines, and films in four American cities. Michigan Journal of Law Reform 21:7-46, 1987/1988. 39. Dietz PE: Abnormal consumer behavior. Mobius: The Journal of the Society of Consumer Affairs Professionals in Business 8:1