31 ene 1830 año - TIMELINE KEY
Descripción:
Purple items are items which pertain strictly to the life of John Muir
Blue items pertain to significant advancements in the field of natural preservation or scientific advancement
Green items pertain to events which involve the political and historical climate of the United States
Red items pertain to the death of presidents while still in office. (there are quite a few during this time period)
Añadido al timeline:
John Muir
fecha:
