Petrographic methods and calculations with some examples of results achieved, Arthur Holmes. Holmes, Arthur, 1890-1965. Petrology. QE434 .H6 552 HOP Plates accompanied by 5 pages of descriptive letterpress not included in paging. London, T. Murby & Co.; New York, D. Van Nostrand Co., c1921. c1921. 1921 Text xix, 515 p. : eng