TY  - RPRT
TI  - Preliminary study of first motion from nuclear explosions recorded on seismograms in the first zone
AU  - J. H. Healy
AU  - G. B. Mangan
PY  - 1963
DO  - 10.3133/70039490
UR  - https://pubs.usgs.gov/publication/70039490
ID  - 70039490
ER  -