//-->
Gold rush legacy : American minerals and the knowledge economy
Clay, Karen, (2012)
The California gold rush : a study of emerging property rights
Umbeck, John, (1977)
The development of first-possession rules in US mining, 1872 - 1920 : theory, evidence, and policy implications
Gerard, David, (1998)
A theoretical and empirical investigation into the formation of property rights: the California gold rush
Umbeck, John Robert, (1976)