Johannsen, Albert A descriptive petrography of the igneous rocks : the feldspathoid rocks, the peridotites and perknites. - Chicago : The University of Chicago Press, 1938. - 523 p. : il. ; 25 cm Subjects--Topical Terms: PetrografíaRoca ígnea Index Terms--Genre/Form: Libro Universal Decimal Class. No.: 552.3