National Earthquake Information Center, World Data Center A: Seismology, & Goter, S. K. (1987). Global distribution of first-motion focal mechanisms, 1981-1985. The Center.
Chicago Style (17th ed.) CitationNational Earthquake Information Center, World Data Center A: Seismology, and Susan K. Goter. Global Distribution of First-motion Focal Mechanisms, 1981-1985. Denver, Colo.: The Center, 1987.
MLA (9th ed.) CitationNational Earthquake Information Center, et al. Global Distribution of First-motion Focal Mechanisms, 1981-1985. The Center, 1987.
Warning: These citations may not always be 100% accurate.