Leet, L. Don 1901-1974. Earthquake: : discoveries in seismology. [electronic resource] . — [New York, : Dell Pub. Co.,, 1964]. — 224 p. — (Laurel science series)(Dell Laurel edition). LCCN: 64055226 Subjects--Topical Terms: Earthquakes. LC Class. No.: QE534 / .L42 Dewey Class. No.: 551.22