Billings, Marland P. Structural geology / Marland P. Billings - 2nd ed. - New Delhi : Prentice- Hall, 1964. - 514 p. : ill. ; 22 cm. - Quarterly 392 392 Subjects--Topical Terms: Geology--Periodicals.Structural. Dewey Class. No.: 551.8 / B496s