21.   Since then he has produced a variety of books on film, establishing himself as an authority on horror and suspense cinema.

22.   The brain has many similar perceptual difficulties, they said, which produce a variety of convincing optical illusions.

23.   The new finding adds to a growing body of evidence that animals produce a variety of natural antibiotics that serve as a defense against infection.

24.   The remnants of a winter storm over North Dakota will still produce a variety of inclement conditions along the Canadian border.

25.   The Stamford-based company produces a variety of paper products, including packaging and newsprint.

26.   Then there are the so-called Foley pits, about three feet long and two feet deep, in which a variety of sound effects can be produced.

27.   The U.S. Treasury currently produces seven varieties of paper currency with pictures of famous Americans on them.

28.   Three months after Brandevor started producing one variety of Simpatico in Iowa, the Dubuque brewery made a trip to bankruptcy court, a potentially disastrous development.

29.   Wednesday, the slightly weakening system will churn across the upper Middle West, producing a variety of weather.

30.   A typical South Korean conglomerate, called chaebol, is composed of dozens of subsidiaries producing a variety of goods.