TY  - BOOK
AU  - Bullen,K.E., x
AU  - x
TI  - An introduction to the theory of seismology: x
SN  - x
U1  - 551.22/BUI 
PY  - 1965///
CY  - Cambridge
PB  - Univ.Press
KW  - Seirmology
N1  - x
ER  -