JOHANNSEN, ALBERT A DESCRIPTIVE PETROGRAPHY OF THE IGNEOUS ROCKS: THE FELDSPATHOID ROCKS (PART I) THE PERIDOTITES AND PERKNITES (PART II) VOLUME IV - S.E. - CHICAGO Estados Unidos THE UNIVERSITY OF CHICAGO 1950 - 523 LCCN: 4763 Subjects--Topical Terms: ROCAS IGNEAS Dewey Class. No.: 552.1