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article
By Jeffrey Mervis
[Published 4th February 1991]



article
By Elizabeth Pennisi
[Published 4th February 1991]



article
By Susan L-j Dickinson
[Published 4th February 1991]



article
By Robin Eisner
[Published 4th February 1991]



article
By Elizabeth Pennisi
[Published 4th February 1991]



article
By Julia King
[Published 4th February 1991]



article
By Theodore Hullar
[Published 4th February 1991]



article
By Gregory Bambeck
[Published 4th February 1991]



article
By Christian Schwabe
[Published 4th February 1991]



article
By Michael Glantz
[Published 4th February 1991]



article
By Eugene Garfield
[Published 4th February 1991]



article
By Bj Luberoff
[Published 4th February 1991]



article
By Angela Martello
[Published 4th February 1991]



article
[Published 4th February 1991]



article
[Published 4th February 1991]



article
[Published 4th February 1991]



article
[Published 4th February 1991]



article
By Theodore Davidson
[Published 4th February 1991]



article
By Dennis P. Curran
[Published 4th February 1991]



article
By Bruce G. Buchanan
[Published 4th February 1991]



article
By Peter D. Moore
[Published 4th February 1991]



article
By Suzanne Hagan
[Published 4th February 1991]



article
By Scott Huler
[Published 4th February 1991]



article
By Lisa Simon
[Published 4th February 1991]



article
By Rebecca Andrews
[Published 4th February 1991]



article
By Rebecca Andrews
[Published 4th February 1991]



article
By Bruce Silver
[Published 4th February 1991]



article
By Jeffrey Mervis
[Published 4th February 1991]



article
[Published 4th February 1991]



article
By Susan Dickinson
[Published 4th February 1991]



article
By Diana Morgan
[Published 4th February 1991]



article
By Diana Morgan
[Published 4th February 1991]