JBIS March 1999

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Sub-Critical Impact
(Part 2)

The Cratering Rate of Planet Earth
D.W. Hughes

The Material Properties of Asteroids and Comets: Implications for Planetary Defence Strategies
M.J. Genge

Seasonal Enhancement and Seismic Triggering by Impacts
C. Vita-Finzi

Response to Sub-Critical Cosmic Impacts
M.B. Gerrard and J.L. Remo