Authors:R.G. Shulman, G. Bloch, and D.L. RothmanFrom:
Proceedings of the National Academy of Sciences of the United States.
(Vol. 92, Issue 19)
Peer-Reviewed
Sept. 12, 199552 words
Article
Abstract Only
1
Get Full Access
Gale offers a variety of resources for education, lifelong learning, and academic research. Log in through your library to get access to full content and features!