- The Last World: The Taoist and Native American Philosophies as a Way of Living in Harmony with Nature by Richard SpiegelPhD, 2002-04-01
- The Last World: The Taoist and Native American Philosophies as a Way of Living in Harmony with Nature by Richard Spiegel, 1980
- A Good Medicine Collection: Life in Harmony with Nature by Adolf Hungry Wolf, 1991-01
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