21.   Advance copies of the proposed bulletin began circulating Friday.

22.   Advance copies were released Wednesday because a rival journal, Nature, is publishing a report Thursday of a different suppressor factor found by a German research group.

23.   Advance copies of his book were available by then.

24.   Advance copies of Internetworks have been praised by some testers as superior to existing programs for browsing the World Wide Web, including Mosaic and its variations.

25.   Advance copies were made available to reporters.

26.   Advance copies of the book are not available.

27.   Advance copies of the paper circulated this week by e-mail.

28.   Advance copies of the text were made available to news organizations.

29.   Advance copies were made available in Washington by World Perspectives Inc., an agricultural consulting group, which helped compile the report, and by the U.S. Agriculture Department.

30.   But network officials, who had seen an advance copy, demanded that he remove the word because they said it was likely to offend listeners.