TY  - BOOK
ED  - United States Coast and Geodetic Survey
TI  - Handbook: world-wide standard seismograph network
U1  - 551.22/H1 21
PY  - 1966///
CY  - Washington, D.C: 
PB  - The University of Michigan, 
KW  - SISMOLOGÍA
KW  - CIENCIAS DE LA TIERRA
ER  -