Title:
Science
Publisher:
American Association for the Advancement of Science (AAAS)
ISSN
(Print):
00368075
ISSN
(Electronic):
10959203
Publication date
(Print):
July
1997
Volume: 277
Issue: 5325
Pages: 500-504
Article
DOI: 10.1126/science.277.5325.500
SO-VID: 4dc90d66-2dcd-4906-8edb-b856b9867457