Linea del tiempo, teorías administrativas

Events

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