Petrographic methods, the authorized English translation of Part I, Anleitung zum Gebrauch des Polarisationsmikroskops (3d. rev. ed.) and Part II, Die gesteinbildenden Mineralien (2d. rev. ed.) (1912)
Weinschenk, Ernst, 1865-1921, Clark, Robert Watson, b. 1884 · New York [etc] McGraw-Hill book company · leaf 354