United States. Census Office, Emmons, S. F., & Becker, G. F. (1885). Statistics and technology of the precious metals. GPO.
Chicago-Zitierstil (17. Ausg.)United States. Census Office, Samuel Franklin Emmons, und George F. Becker. Statistics and Technology of the Precious Metals. Washington: GPO, 1885.
MLA-Zitierstil (8. Ausg.)United States. Census Office, et al. Statistics and Technology of the Precious Metals. GPO, 1885.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.