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Science  05 Nov 1999:
Vol. 286, Issue 5442, pp. 1047d
DOI: 10.1126/science.286.5442.1047d

Astrolode. Over 1.5 million astronomy and physics references can be searched at the Astrophysics Data System, a free bibliographic database on the Internet since 1993. Includes links to data and citations, as well as scanned full text of two dozen journals as far back as the 1800s. ads

Digital world.National Geographic has just unveiled its latest world atlas, souped up with a Web site where you can download free customized maps. Specify details such as geologic fault lines and weather data at

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