TY  - BOOK
AU  - Poppe, Barbara B.
AU  - Derr, John S., coaut.
AU  - Nabb, Debbi A., coaut.
TI  - Seismograph station codes and characteristics / by Barbara -B. Poppe, Debbi A. Naab, and John S. Derr
CY  - Arlington, V. A. : United States Geological Survey
ER  -