%0 Journal Article %T Calibrating rates of early Cambrian evolution. %A Bowring, S A %A Grotzinger, J P %A Isachsen, C E %A Knoll, A H %A Pelechaty, S M %A Kolosov, P %J Science (New York, N.Y.) %V 261 %P 1293-8 %@ 0036-8075 %D 1997-08-09 %~ DeepDyve