TY  - BOOK
AU  - Ritsema, A.Reinier.
TI  - Seismicity and seismic risk in the offshore north sea area / 
SN  - 90-277-1529-7
U1  - H4332p596,N82 
PY  - 1985///
CY  - Dordrecht : 
PB  - D.Reidel Publishibg Company , 
KW  - North Sea Area
ER  -