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Science 8 November 1996:
Vol. 274. no. 5289, pp. 917 - 0
DOI: 10.1126/science.274.5289.917
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Research News

Karen Schmidt

To target the best places for protection, conservation biologists often overlay maps of the ranges of different species in a technique called "gap analysis." The method has been valuable in pinpointing unprotected sites, but some critics charge that the range maps themselves are unreliable.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)