TY  - BOOK
AU  - Gudzin, M.G.
TI  - Seismological observatories / by M. G. Gudzin and E.G. Hull-e
CY  - Estados Unidos : IRE
N1  - "Reprinted from the Proceedings of the IRE, Vol.50,No.11,no-vember, 1962"
ER  -