TY  - GEN
AU  - García-Aristizábal,Alexander
AU  - Acevedo,Alvaro Pablo
AU  - Ruiz,Mario
ED  - International symposium on andean geodynamics, 5
TI  - Spatial and temporal variations of the quality factor -Q- before and during the 1999 Guagua Pichincha eruptions
N1  - bibliogr. p. 234
ER  -