https://www.theepochtimes.com/bright/george-bird-grinnell-the-father-of-american-conservation-5400114
George Bird Grinnell: The Father of American Conservation | The Epoch Times
george bird grinnellthe fatheramericanconservationepoch
https://www.gutenberg.org/ebooks/44671
Jack in the Rockies: A Boy's Adventures with a Pack Train by George Bird Grinnell | Project...
Free eBook digitized and proofread by volunteers.
https://www.abebooks.com/9781586670634/Hunting-Trails-Three-Continents-Grinnell-1586670638/plp
Hunting Trails on Three Continents - Grinnell, George Bird; Roosevelt III Professor Of Law Univers,...
The book contains essays by prominent members including Madison Grant, who successfully lobbied for the protection of the Giant Sequoias in California, and it...