- www.sierraclub.org/john_muir_exhibit
- John Muir Day - Celebration and History: source materials on founding and celebration of John Muir Day (April 21); part of the John Muir Exhibit ...www.sierraclub.org/john_muir_exhibit/john_muir_day
- Old John Muir writings from a sojourn in the Sierra ...www.theatlantic.com/unbound/flashbks/muir/muir.htm
