1. ADAMS, R.D., EARLY REFLECTIONS OF P'P' AS AN INDICATION OF UPPER MANTLE STRUCTURE, BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 58: 1933 (1968).
2. AKI, K, BULLETIN OF THE EARTHQUAKE RESEARCH INSTITUTE, UNIVERSITY OF TOKYO 44: 23 (1966).
3. AKI, K, BULLETIN OF THE EARTHQUAKE RESEARCH INSTITUTE, UNIVERSITY OF TOKYO 44: 73 (1966).
4. BARAZANGI, M, WORLD SEISMICITY MAPS COMPILED FROM ESSA COAST AND GEODETIC SURVEY EPICENTER DATA 1961-1967, BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 59: 369 (1969).
5. BARAZANGI, M, SEISMICITY MAP OF ARCTIC COMPILED FROM ESSA, COAST AND GEODETIC SURVEY, EPICENTER DATA JANUARY 1961 THROUGH SEPTEMBER 1969, BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 60: 1741 (1970).