TY  - RPRT
TI  - Preface to the Focused Issue on the 22 February 2011 Magnitude 6.2 Christchurch Earthquake
AU  - Erol Kalkan
PY  - 2011
DO  - 10.1785/gssrl.82.6.765
UR  - https://pubs.usgs.gov/publication/70236058
ID  - 70236058
ER  -