Linea del tiempo, teorías administrativas

Events

Approx. 1840 - Approx. 1916
1886
Approx. 1886 - Approx. 2000
1888
1892
Approx. 1920 - Approx. 1967
Approx. 1950 - Approx. 1970
Approx. 1970 - Approx. Present
1970
Approx. 2000 - Approx. Present