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: 494-499
Article
DOI: 10.1126/science.277.5325.494
SO-VID: ece5a697-4310-45bb-9d69-a867d11ed773