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A note on the references

Where Uniform Resource Locators (URL) are included in the citation, they were believed to be correct at the time of publication but may have changed since. Current links to to every online information filtering reference of which we are aware (including those filtering types of information other than text) can be found on the World Wide Web at http://www.clis.umd.edu/dlrg/filter/. The first author would appreciate being notified of additional online resources or changed URL's by electronic mail.



Douglas W. Oard
Sun Apr 27 13:18:52 EDT 1997

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