APA (7th ed.) Citation
Richards, R. H. (1940). Textbook of ore dressing. [s.n.].
Chicago Style (17th ed.) Citation
Richards, R. H. Textbook of Ore Dressing. [s.l.]: [s.n.], 1940.
MLA (9th ed.) Citation
Richards, R. H. Textbook of Ore Dressing. [s.n.], 1940.
Warning: These citations may not always be 100% accurate.