551.22 B Byerly, Perry, 1897- Seismology, y Perry Byerly...New York, Prentice-Hall inc., 1942. xp., 1 l., 256p. incl. ilus., tables, diagrs. 23cm. (Prentice-Hall geology series, ed by N.E.A. Hinds) "References"at tend of each chapter.