PT  - JOURNAL ARTICLE
AU  - PASSANO, L. M.
TI  - Primitive Systems
AID  - 10.1126/science.252.5005.588-a
DP  - 1991 Apr 26
TA  - Science
PG  - 588--589
VI  - 252
IP  - 5005
4099  - http://science.sciencemag.org/content/252/5005/588.2.short
4100  - http://science.sciencemag.org/content/252/5005/588.2.full
SO  - Science1991 Apr 26; 252